9 Week Review for Final Exam
1. Is the acceleration constant or changing?
What is the velocity of the object? (hint: a = v/t)
2. For the indicated time intervals velocity is:
Speeding up
Slowing down
Constant
Zero
Direction (pos. or neg.)
5. Your girlfriend’s father is chasing through the
neighborhood, you have hit your top velocity of
13 m/s in 7 seconds. You are cramping up and can’t run
any longer and dive into a truck bed and lay quietly as
you hear the father run by you. Assuming you had
uniform deceleration, how far did you run?
NAME___________________________________
6. Which of Newton’s 3 Laws applies?
b) A physics book is at rest on a tabletop
a) A massive linebacker collides with a smaller halfback
at midfield. The force experienced by the
linebacker is ____________ (less than, equal to, greater
than) the force experienced by the halfback. The
resulting acceleration of the linebacker is ____________
(less than, equal to, greater than) the resulting
acceleration of the halfback. Law: 1 2 3
c) 2 dogs are pulling on a chew toy in opposite
directions. The first dog pulls with a force of 65 N to the
left and the second dog pulls with a 48 N forces to the
right. Draw a FBD of the chew toy and calculate the
direction and magnitude of the net force.
b) You are on the bus and you put your book bag in the
aisle, the bus comes to an abrupt stop, your book back
_________(remains stationary, slides forward, slides
backward) . Law: 1 2 3
3. For the indicated time intervals position is:
Increasing
Decreasing
Constant
Direction (neg. or pos.)
Velocity changing or constant
Acceleration (0 m/s2, 5 m/s2, 2 m/s2)
c) In order to withstand the force of the wind
accelerating the cart too much, what do you do to adjust
the mass of the cart? _____(take objects out of the cart,
you add more things to the cart) Law 1 2 3
a) A car is coasting to the right and slowing down.
Neglect air resistance. Diagram the forces acting on the
car.
d) A fox got caught in a trap hanging from a tree. You
are in the tree and haul up the trap by the rope. Diagram
the forces acting on the fox.
e) A horse died and was dragged up a hill to be buried.
Diagram the forces acting on the horse.
7. Newton's Third Law of motion: for every action,
there is an equal and opposite reaction.
Action: Man pushes car
Reaction:____________
9. Suppose you are taking a spacewalk near the space
shuttle and your safety line breaks. Luckily you have a
tool belt. How do you use the tool belt to get back to the
ship? Whose acceleration is greater (yours or the tool)?
Action: Bat hits ball
Reaction:___________
4. Determine the mass of the cannonball based on the
information of the graph (hint: F = ma)
8. For the following scenarios answer the following
questions:
- Is the object at rest, have a constant velocity, or
accelerating?
- What is the direction of acceleration or deceleration?
- Do the forces need to be balanced in the x direction?
Indicate the net forcex
- Do the forces need to be balanced in the y direction?
Indicate the net forcey
10. Jupiter is the most massive planet within our solar
system. The acceleration of gravity is 24.79 m/ss. If
your weight on Jupiter is 14,874 N, then what is your
weight on earth?
11. As you push with all your might, veins pulsing,
gases leaking out of you, the 10 kg box accelerates from
rest to 15 m/s in 3 seconds. Then it travels at a constant
velocity for 5 seconds traveling a distance of 20 m.
What force is needed to get the object moving?