Question

Extra Points because there are three questions.

1. An object goes from 20 m/s to 5 m/s in 1.2 seconds. What is the acceleration of the object?

a=vf-vi/t

2. What is the difference between distance and displacement? What is the difference between mass and weight?


3. What is the force necessary to accelerate a 40 kg object to 6 m/s/s?

F=ma

Answer 1

1. Change in velocity=5-20
Change in velocity=-15 (Deceleration)
Acceleration= change in velocity/time
a=-15/1.2
a=12.5m/s2

2. Distance has no magnitude and no direction but displacement has both magnitude and direction
Mass is constant but weight varies from places to places. Also, mass is the quantity of a substance contained in matter while weight is the force exerted by a body

3. Force=ma
f= 40*6
f=240N