Question

Calculate the kinetic energy of an 88-kg scooter moving at 10 m/s . express your answer to two significant figures and include the appropriate units.

Answer 1

Answer: The kinetic energy of the scooter is $4.4\times 10^3J$

Explanation:

Kinetic energy is defined as the energy which is possessed due to its motion.

It is also defined as the half of the product of mass of the object and square of the velocity of the object.

Mathematically,

$E_K=\frac{1}{2}mv^2$

where,

$E_K$ = kinetic energy of scooter

m = mass of the scooter = 88 kg

v = velocity of scooter = 10 m/s

Putting values in above equation, we get:

$E_K=\frac{1}{2}\times 88\times (10)^2\\\\E_K=4400J=4.4\times 10^3J$

Hence, the kinetic energy of the scooter is $4.4\times 10^3J$

Answer 2

Given:

m(mass)=88kg

v(velocity)=10m/s

Now kinetic energy=1/2(mv^2)

Where m is the mass

v is the velocity

Substituting these values we get

Kinetic energy=1/2(88 X 10 x 10)

Kinetic energy = 4400 N