Suppose a skydiver (mass = 75kg) is falling toward the earth. when the skydiver is 100m above the earth, he is moving at 60m/s. at this point, calculate the skydiver’s: • gravitational potential energy • kinetic energy • total mechanical energy (kinetic + potential)

gravitational potential energy is given as

here given that

m = 75 kg

g = 9.8

H = 100 m

now plug in all value above

now for kinetic energy we can use

here we have

m = 75 kg

v = 60 m/s

now we have

now for mechanical energy we have

so now we will add above to energy to find mechanical energy

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

a and b sometimes have a positive value