Johanna is studying what happens to the energy as a ball rolls down a ramp. what is she studying? check all that apply.

1. gravitational potential energy
2. electrical energy
3. kinetic energy
4. mechanical energy
5. elastic potential energy

Gravitational potential energy, kinetic energy and mechanical energy

Explanation:

The body is at a displacement to the gravity and therefore has energy stored in it as a result of its displacement against gravity. When this body is released the gravitational potential energy is converted to translational kinetic energy as well as rotational kinetic energy as it rolls down the the ramp. The sum of the kinetic energies and potential energy of the body amount to the mechanical energy of the ball down the ramp.

the total distance traveled by the car is

30km + 49km = 79 km .

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2