Physics Forces and Motion

Question

A heavy box has a mass of 30 kg. The box experiences a net force of 90 N when pushed along the floor. Use

this information to answer questions 17 and 18

17. What is the acceleration of the box?

a. 3 m/s 2 b. 2 m/s 2 c. 0.3 m/s 2 d. 0.5 m/s 2

18. If the mass of the box was changed to one third as much, and the force was held constant, how would

the acceleration change?

a. It would be one third as much

b. It would be 3 times as much

c. It would be one half as much

d. It would be 2 times as much

Answer 1

a=F/m

a=90N/30kg

a=3 m/s²

17) is answer C

For m=10kg

a=90N/10kg

a=9m/s²

18) is answer B