CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
Name: _____________________________
Date: ______________________
Class: _____________________________
Final Test
Score:
Direction: Write the letter of your answer (in CAPITAL letters) before the item number.
1. A driving force F acts on a car which moves with constant velocity v. The quantity Fv is equivalent to
the
A. useful power developed by the engine of the car.
B. work done by the car against resistive forces.
C. energy of the car.
D. rate of change of momentum of the car.
2. Which of the following is an elastic collision?
A. Two railway trucks collide and they link together.
B. Two railway trucks collide and they do not link together.
C. Two gas molecules collide and each changes direction.
D. Two gas molecules collide and a bond is formed between them.
3. The momentum of a particle stays constant provided that
A. it moves in a circle with constant speed.
B. its acceleration is uniform.
C. the net internal force acting on it is zero.
D. the net external force acting on it is zero.
4. A student makes three statements about situations in which no work is done on an object.
I.
The object is moving with uniform circular motion.
II.
A force is applied to the object in the direction of its velocity.
III.
A force is applied to the object in a direction opposite to its motion.
Which of the above statements is/are correct?
A. I only
C. I and III only.
B. I and II only
D. III only.
5. The net force on a body is F. The impulse of F is equal to the
A. change in momentum of the body.
B. rate of change of momentum of the body.
C. change of kinetic energy of the body.
D. change of total energy of the body.
6. Which of the following is necessary for an object to be in translational equilibrium?
A. The object must be stationary.
B. The object must move with a constant speed.
C. The resultant force acting on the object must be zero.
D. No forces must act on the object.
7. A cart of mass 4.0 kg is being pulled with a force of 24 N. The cart accelerates at 3.0m s-2.What is the
net force on the cart?
A. 6.0 N
C. 12 N
B. 8.0 N
D. 24 N
8. In the collision between two bodies, Newton’s third law
A. only applies if momentum is conserved in the collision.
B. only applies if energy is conserved in the collision.
C. only applies if both momentum and energy are conserved in the collision.
D. always applies.
IBCP G11 19/20 | 1
CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
9. Two forces of magnitude 12 N and 24 N act at the same point. Which force cannot be the resultant of
these forces?
A. 10 N
C. 19 N
B. 16 N
D. 36 N
10. A block of weight W slides down a ramp at constant velocity. A friction force F acts between the bottom
of the block and the surface of the ramp. A normal reaction N acts between the ramp and the block.
What is the free-body diagram for the forces that act on the block?
11. An object is moving in a straight line. A force F and a resistive force f act on the object along the
straight line.
Both forces act for a time t.
What is the rate of change of momentum with time of the object during time t?
A. F + f
C. (F + f )t
B. F – f
D. (F – f )t
12. Which is a unit of force?
A. J m
B. J m–1
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C.
D.
J m s–1
J m–1 s
CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
13. The diagram shows the forces acting on a block resting on an inclined plane. The angle θ is adjusted
until the block is just at the point of sliding. R is the normal reaction, W the weight of the block and F
the maximum frictional force.
What is the maximum coefficient of static friction between the block and the plane?
A. sin θ
C. tan θ
B. cos θ
D.
14. The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the
useful work done by the motor?
A. 100 J
C. 250 J
B. 125 J
D. 400 J
15. A stone is falling at a constant velocity vertically down a tube filled with oil. Which of the following
statements about the energy changes of the stone during its motion are correct?
I. The gain in kinetic energy is less than the loss in gravitational potential energy.
II. The sum of kinetic and gravitational potential energy of the stone is constant.
III. The work done by the force of gravity has the same magnitude as the work done by friction.
A. I and II only
B. I and III only
C.
D.
II and III only
I, II and III
16. A heat engine does 300 J of work during one cycle. In this cycle 900 J of energy is wasted. What is the
efficiency of the engine?
A. 0.25
C. 0.50
B. 0.33
D. 0.75
17. A force which increases uniformly from 0 to a maximum value of F is applied to an object. The object
does not move until the force exceeds 0.5F. As the force increases from 0.5F to F the object moves a
distance x in the direction of the force. What is the work done by this force?
A. 0.25Fx
C. 0.75Fx
B. 0.5Fx
D. Fx
18. A student of weight 600N climbs a vertical ladder 6.0m tall in a time of 8.0s. What is the power
developed by the student against gravity?
A. 22W
C. 220 W
B. 45W
D. 450 WW
19. An object has a weight of 6.10 × 102 N. What is the change in gravitational potential energy of the
object when it moves through 8.0 m vertically?
A. 5 kJ
C. 4.88 kJ
B. 4.9 kJ
D. 4.880 kJ
IBCP G11 19/20 | 3
CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
20. Two blocks of masses m and 2m are travelling directly towards each other. Both are moving at the same
constant speed v. The blocks collide and stick together.
What is the total momentum of the system before and after the collision?
21. An astronaut is moving at a constant velocity in the absence of a gravitational field when he throws a
tool away from him.
What is the effect of throwing the tool on the total kinetic energy of the astronaut and the tool and the
total momentum of the astronaut and the tool?
22. What is the correct SI unit for momentum?
A. kg m–1s–1
C.
2 –1
B. kg m s
D.
kg ms–1
kg ms–2
23. A car travelling at a constant velocity covers a distance of 100 m in 5.0 s. The thrust of the engine is 1.5
kN. What is the power of the car?
A. 0.75 kW
C. 7.5 kW
B. 3.0 kW
D. 30 kW
24. An egg dropped on the floor is likely to break. However, when it is wrapped in a cloth it is less likely to
break. This is because the cloth
A. increases the time for which the force of the ground acts on the egg.
B. reduces the momentum of the egg.
C. reduces the change of momentum of the egg.
D. reduces the impulse acting on the egg.
IBCP G11 19/20 | 4
CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
25. A ball X moving horizontally collides with an identical ball Y that is at rest.
X strikes Y with speed v.
What is a possible outcome of the collision?
Completely solve the following problems.
1. This question is about the forces on a skier.
a. A skier is pulled up a hill by a rope at a steady velocity. The hill makes an angle of 12° with the
horizontal. The mass of the skier and skis is 73 kg. The diagram below shows three of the forces
acting on the skier.
On the diagram, draw and label one other force acting on the skier.
[1 Mark]
b. Calculate the magnitude of the normal reaction acting on the skier.
[2 Marks]
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CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
c. The total frictional force acting is 65 N. Determine the tension in the rope.
[2 Marks]
d. Explain, using Newton’s first law of motion, why the resultant force on the skier must be zero.
[2 Marks]
2. This questions is about momentum change.
a. State the law of conservation of linear momentum.
b. Gravel falls vertically onto a moving horizontal conveyor belt.
[2 Marks]
[7 Marks]
(i)
The gravel falls at a constant rate of 13 kg s–1 through a height of 1.9 m. Show that the
vertical speed of the gravel as it lands on the conveyor belt is about 6 m s–1.
(ii)
The gravel lands on the conveyor belt without rebounding. Calculate the rate of change of the
vertical momentum of the gravel.
(iii)
Gravel first reaches the belt at t = 0.0 s and continues to fall. Determine the total vertical
force that the gravel exerts on the conveyor belt at t = 5.0 s.
IBCP G11 19/20 | 6
CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
c. The conveyor belt moves with a constant horizontal speed of 1.5 m s–1. As the gravel lands on the
belt, it has no horizontal speed.
[4 Marks]
(i)
Calculate the rate of change of the kinetic energy of the gravel due to its change in horizontal
speed.
(ii)
Determine the power required to move the conveyor belt at constant speed.
(iii)
Outline why the answers to (c)(i) and (ii) are different.
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CITA HATI CHRISTIAN SENIOR SCHOOL – WEST CAMPUS
Bukit Golf L-2. No1, Citraland Surabaya
International Baccalaureate Physics Diploma/Certificate Program
3.
a. A car accelerates uniformly along a straight horizontal road from an initial speed of
to a
final speed of
in a distance of 250 m. The mass of the car is 1200 kg. Determine the rate at
which the engine is supplying kinetic energy to the car as it accelerates.
[4 Marks]
b. A car is travelling along the straight horizontal road at its maximum speed of
output required at the wheels is 0.13 MW.
. The power
[5 Marks]
(i)
Calculate the total resistive force acting on the car when it is travelling at a constant speed of
.
(ii)
(ii) The mass of the car is 1200 kg. The resistive force is related to the speed by
.
Using your answer to (b)(i), determine the maximum theoretical acceleration of the car at a speed
of
.
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