A car is traveling at a constant speed of 12 m/s. When the driver accelerates, the car reaches a speed of 26 m/s in 6 s. What is the average acceleration of the car?
2 m/s/s
2.3 m/s/s
4.3 m/s/s
84 m/s/s
A large rock has a mass of 750 kg. What is its weight?
76.5 N
740.2 N
740.2 N
7,350 N
A 100-kg student kicks a 1.5-kg ball with a force of 450 N. What force does the ball apply on the student?
4.5 N
300 N
450 N
675 N
0 m
8 m
50 m
100 m
action-reaction forces
electrical forces
friction
gravitational potential energy
A student applies a force to a box with a mass of 30 kg. If the student applies the same force to a box with a mass of 15 kg, which best describes the effect on the acceleration of the 15-kg box?
It is half the acceleration of the 30-kg box
It is double the acceleration of the 30-kg box.
It is the same as the acceleration of the 30-kg box.
