Question

Help me with this question please

Answer 1

The correct answer option is D) 3539.3 joules

Explanation:

We are given that a weighing 63 kilogram is sprinting at a rate of 10.6 meters per second and we are to find his kinetic energy.

Kinetic Energy =
`\frac { 1 } { 2 } m v ^ 2`

Substituting the given values in the above formula to get:

Kinetic Energy =
`\frac { 1 } { 2 } * 63 * 10.6 ^ 2`

Kinetic energy = 3539.3 joules

Answer 2

D

Explanation:

Kinetic energy is given by the formula
`KE=(1)/(2)mv^2`

Where

KE is the kinetic energy (in joules)

m is the mass (in kg)

v is the velocity/rate ( in meters /second)

Given in the question, the mass is 63 kgs (m=63), velocity/rate is 10.6 meters per second (v=10.6). We plug them into the formula and calculate the KE:

`KE=(1)/(2)mv^2\\KE=(1)/(2)(63)(10.6)^2\\KE=3539.34`

rounding to nearest tenth: KE = 3539.3 joules