Cumulative Review 1
1. Which of the following are vector quantities?
a. mass, speed
b. mass, velocity
c. displacement, speed
d. displacement, velocity
Use the following information to answer the next two questions.
An airplane heads due north at a speed of 75 m/s. The wind is blowing west at 18
m/s.
2. What is the magnitude of the airplane’s resulting velocity?
a. 57 m/s
b. 73 m/s
c. 77 m/s
d. 93 m/s
3. As a result, the direction the airplane is heading in is
a. 13.5o W of N
b. 13.5o N of W
c. 103o
d. 76.5o W of N
4. A projectile is fired horizontally at 25 m/s from an 18 m high cliff. How far from the
bottom of the cliff will it land?
a.
b.
c.
d.
18 m
30 m
46 m
48 m
5. The diagram below represents the path of an object after it was thrown. What
happens to the object’s acceleration as it travels from A (the highest point) to B?
[Neglect friction.]
a. It decreases in magnitude but the direction remains the same.
b. It increases in magnitude but the direction remains the same.
c. It remains the same in magnitude and direction.
d. The magnitude remains the same but the direction changes.
6. A projectile is fired at 68.1 m/s at an angle of 55.0 o to the horizontal. How high
will it go?
a. 236 m
b. 159 m
c. 77.8 m
d. 2.84 m
7. Determine the net force required to accelerate a 25.1 kg object at 5.50 m/s 2.
a. 384 N
b. 138 N
c. 108 N
d. 25.1 N
8. Which of the following best describes uniform circular motion?
9. A 5.33 kg object is moving in a circle of 1.50 m radius. If the object is rotating at
12.0 revolutions per second, the centripetal force acting on the object is
a. 4.55 x 104 N
b. 2.19 N
c. 1.45 x 103 N
d. 1.21 x 103 N
10. A 75 kg astronaut lands on a small planet with a mass of 5.8 x 10 21 kg and a
radius of 7.3 x 105 m. The gravitational field strength at the surface is
a. 0.73 N/kg
b. 1.6 N/kg
c. 9.8 N/kg
d. 54 N/kg
11. A 3.00 kg object is fired straight up at 21.0 m/s from ground level. When it is 4.00
m above the ground, its speed is
a. 402 m/s
b. 363 m/s
c. 19.0 m/s
d. 20.0 m/s
12. An object is suspended by cords as shown in the diagram below.
If the tension in two of the cords is 250 N, what is the weight of the object?
A. 1.6 x 102 N
B. 3.2 x 102 N
C. 3.8 x 102 N
D. 5.0 x 102 N
13. A 65 N force acts on a 5.0 kg object as shown. Determine its acceleration, if the
coefficient of friction is 0.25.
14. The asteroid Icarus has an orbital period of 1.12 years. Using the third law of
R3
planetary motion, 2 = a constant, calculate the radius of its orbit in metres.
T
15. A gravitational force of 1.45 x 10-7 N acts between two objects when they are
1.56 m apart. If one mass is 3.00 kg, the mass of the other object is ____ kg.
16. A satellite is in orbit above Earth at a distance of 7.15 x 10 6 m from the centre of
Earth. Calculate the period of its orbit.
17. Determine the weight of a 50.0 kg person on the surface of Ganymede (m=1.48 x
1023 kg, r = 2634 km), one of the moons of Jupiter.
18. A frictionless water slide is made so that swimmers, starting from rest at the top,
leave the end of slide horizontally as shown. One person is observed to hit the
water 6.0 m from the end of the slide 0.45 s after leaving the slide. Determine the
height, h, of the slide.
Answers
1. d
2. c
3. a
4. d
5. b
6. b
7. c
8. a
9. a
10. c
11. b
12. 8.0 m/s2
13. 1.61 x 1011 m
14. 1.76 x 103 kg
15. 6.01 x 103 s
16. 71.1 N
17. 9.1 m