Question

a man weighing 60kg runs with a speed of 5m/s to catch a bus ( g=10 m/s2). find the potential energy of this man when he climbs to top at a height 70m.​

Answer 1

Given :

Mass of the man = 60kg

Velocity of the man = 5kg

gravitational force = 10m/s²

height = 70m.

To find :

the potential energy of the man

Solution :

Potential energy is energy due to position.

• Potential energy is scalar quantity having magnitude.
• Sl unit of P.E is Joules.
• CGS unit of P.E is erg.

The potential energy is given by

$\boxed{ \gray{ \bf P.E = mgh}}$

• m denotes mass
• g denotes gravitational force
• h denotes height

now substituting all the given values in the formula,

$\leadsto{ \sf P.E = mgh}$

$\leadsto{ \sf P.E = (60)(10)(70)}$

$\leadsto{ \sf P.E = 42000 \: J}$

thus, the potential energy possesed by the man is 42000 J.