Question

A 10 kg toddler on a tricycle is sitting at the top of a5 meter high hill. a) What is the toddler's potential energy? b) As the toddler travels down the hill on his tricycle, he reaches an average velocity of 10m/s. What is the kinetic energy?

Answer 1

Answer:

(a) potential energy = 490.5 kg $m^{2}/s^{2}$

(b) kinetic energy = 500 kg $m^{2}/s^{2}$

Explanation:

Given data in question

total mass (m)  = 10 kg

total height (h) = 5 m

average velocity = 10 m/s

To find out

potential energy and kinetic energy

Solution

First we calculate potential energy, and we know formula for potential energy is

potential energy = mass × gravity × height

put the value of mass and height and take gravity force = 9.81 $m/s^{2}$

potential energy = 10 × 9.81 × 5

potential energy = 490.5 kg $m^{2}/s^{2}$

Now we calculate kinetic energy, and the kinetic energy formula is given below

kinetic energy = 1/2 × mass × velocity²

put the value of mass and velocity

kinetic energy = 1/2 × 10 × 10²

kinetic energy = 500 kg $m^{2}/s^{2}$