Question

An object of mass 200 g starting from rest acquires a velocity of 6 m/s in 4 s.

Answer 1

Answer:

Given that,

Mass m=2kg

Initial velocity u=0m/s

Final velocity v=20m/s

Time t=4s

Now, the acceleration is

 v=u+at

a=tv−u​

a=420​

a=5m/s2

Now, the force is

 F=ma

F=2×5

F=10N

Now, the displacement is

 s=ut+21​at2

s=0+21​×5×16

s=40m

Now, the work done is

 W=F⋅s

W=10×40

W=400J

Now, the power is

 P=tW​

P=2400​

P=200watt

Hence, the power is 200 watt

Explanation:

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Answer 2

Answer:

here is the answer

Explanation:

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