Velocity vs. Time for a Cart 20
15
10
5
Velocity (m/s)
0
-5
-10
-15
-20
0 1 2 3 4 5 6 7
Time (s)
What is the magnitude of the change in the momentum of the cart from t=0 to
t=3 seconds?
A. 20 N-S
B. 30 N-s
C. 60 N-S
D. 80 N-S

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?