## suppose a skydiver (mass = 75kg) is falling toward the Earth. When the skydiver is 100m above the earth he is moving 60m/s. At this point c

Question

suppose a skydiver (mass = 75kg) is falling toward the Earth. When the skydiver is 100m above the earth he is moving 60m/s. At this point calculate the skydivers…….

Gravational potential energy

Kinetic energy

0

## Answers ( No )

1. From the question,
The mass of the skydiver,

The height from the Earth at which the skydiver is before falling,

Velocity, V of the skydiver

Let us take acceleration due to gravity to be ;

The mass of the skydiver, m=75kg

The height from the Earth at which the skydiver is before falling, h=100m

Velocity, V of the skydiver =60m/s

Potential energy, P.E can be calculated from the relation;
P.E = mgh

P.E =75000 J

Therefore, the gravitational potential energy of the skydiver is 75000 J

Kinetic energy,K.E

=135000 J

Hence the kinetic energy of the Skydiver is 135000 J

2. Answer:

Kinetic energy  = 135 kJ

Potential energy = 73.5 kJ

Explanation:

Mass of sky diver = 75 kg

Velocity = 60 m/s

Height = 100 m

Kinetic energy is given by the expression, , where m is the mass and v is the velocity.

So Kinetic energy  =

Potential energy is given by the expression, PE =mgh, m is the mass, g is the acceleration due to gravity value and h is the height.

So, Potential energy = 75*9.8*100 = 73500J = 73.5 kJ