Question

1. An object starting from rest travels with an acceleration of 10 m/s. What will be its
velocity after 4 s?

2. A body starting from rest and moves with uniform acceleration. The velocities of the
body are 40 m/s at the 4th second and 60 m/s at 8th second.
a) Calculate the acceleration of the body?
b) What will be its velocity after two seconds?

3. If the velocity of a car starting from rest becomes 40 m/s in 5 minutes.
a) Find out its acceleration?
b) Calculate the distance travelled by the car within this time interval?

Answer 1

Answer:

v=40m/s

Explanation:

u = 0
a=10m/s

t=4s,

v=?

the final velocity is obtained as:

v=u+at,

v=0+10x4,
v=40