Question

An object move along a straight line with an acceleration of 2 m/s ^2.if it's initial velocity is 10 m/s,wht will be it's speed after 5s later

Answer 1

Answer:

Given

a=2m/s^2

u=10m/s

t=5s

v=??

now according to the first eq of motion

v=u+at

v=10+2*5

v=10+10

v=20 m/s

hence it is ur ans

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Answer 2

Answer:

20 m/sec

Explanation:

now velocity = 10 m/s

for 1 second change in velocity = 2m/s so for 5 sec 2m/s^2*5s so answer is 10 m/sec

so 10m/s +10m/s =20 m/s