Question

The power of a motorcycle is 4.5W. What is the amount of force required to move the motorcycle at the velocity of 12 ms-1?

Answer 1

Given:

Power of motorcycle,P= 4.5 W

To Find:

Amount of force required to move the motorcycle at the velocity of 12 m/s

Solution:

We know that,

• The expression of power P can be written as

$\pink{\boxed{\bf{P=Force\times Velocity}}}$

$\rule{190}{1}$

Let the required force be F

So,

$\longrightarrow\rm{P=Fv}$

$\longrightarrow\rm{4.5=F\times12}$

$\longrightarrow\rm{F\times12=4.5}$

$\longrightarrow\rm{F=\dfrac{4.5}{12}}$

$\longrightarrow\rm\green{F=0.375\ N}$

Hence, force of 0.375 N is required to move the motorcycle at the velocity of 12 m/s.