Question

a box of mass 400 kg rests on a carrier of truck that is moving at a speed of 120km/h the driver applies brake and slow to a speed of 60km/h . the constant acceleration generated upon the box
​

Answer 1

CORRECT QUESTION

A box of mass 400 kg rests on a carrier of truck

that is moving at a speed of 120km/hr the driver

applies break and slow down to a speed of

60km/hr. in 20 seconds find the constant acceleration generated upon the box

EXPLANATION

V = U + at

V = 60km/hr = 60 X 5/18 = 16.67m/s

U = 120km/hr = 120 X 5/18 = 33.33m/s

t = 20 seconds

16.67 = 33.33 + 20a

-16. 66 = 20a

a = -16. 66/20

a = - 0.83 m/s^2 = ANSWER

Answer 2

Answer:

A box of mass 400 kg rests on a carrier of truck

that is moving at a speed of 120km/hr the driver

applies break and slow down to a speed of 60km/hr. in 20 seconds find the constant

acceleration generated upon the box

EXPLANATION

V=U + at

V = 60km/hr = 60 X 5/18 = 16.67m/s

U = 120km/hr = 120 X 5/18 = 33.33m/s

t = 20 seconds

16.67= 33.33 + 20a

-16. 66 = 20a

a = -16. 66/20

a = - 0.83 m/s^2 = ANSWER