Question

to a height
man
at the
A
af mass 80
kg jumps
of 0.8m he potential
energy
highest paint u eg=10m/s^2)
1​

Answer 1

Answer:

an example

If a ball is thrown vertically upwards with 40 m/s its velocity after two second will be:-

velocity after 2 sec. 

v=40+(−10)t=40−10∗2=20m/s

Answer 2

CORRECT QUESTION:

A man of mass 80 kg jumps to a height of 0.8 m. Find the potential energy at the highest point.

SOLUTION:

• Mass of the man, m = 80 kg.

• Height , h = 0.8 m

• Acceleration due to gravity, g = 10 m/s²

Let U be the potential energy.

We know that,

Potential energy, U = mgh

$= 80 \times 10 \times 0.8 \\ \\ = 80 \times 8 \\ \\ U = 640 \: joules$

Potential energy at the highest point is 640 J.