Question

A roller coaster is at the top of a 72 m hill and weighs 7.9 kg. The block has what energy?

Answer 1

The block on the roller coaster at the top of the hill has gravitational potential energy. Gravitational potential energy is given by the equation PE = mg, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point. In this case, the block has a gravitational potential energy of 5569.28 J.

Step-by-step explanation:

The block on the roller coaster at the top of the hill has gravitational potential energy. Gravitational potential energy is the energy an object possesses due to its position in a gravitational field. It is given by the equation PE = mg, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point.

In this case, the height of the roller coaster is 72 m and the mass is 7.9 kg. Plugging these values into the equation, we get PE = (7.9 kg)(9.8 m/s^2)(72 m) = 5569.28 J.

Answer 2

a una velocidad de

22 m/s, quien lo golpea y devuelve en la misma

dirección con una velocidad de 14 m/s. Si el

tiempo de contacto del balón con la jugadora es

de 0,03 s, ¿con qué fuerza golpeó la jugadora el

balón?

21 Una bala de 0,8 g, está en la recámara de un rifl e

cuando se g