A 5 kg ball is dropped from a height of 200 meters on Earth. a) What is the ball’s potential energy at its original height?

9800 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 5 kg

Height (h) = 200 m

Potential energy (PE) =?

Potential energy (PE) is the energy stored in an object by virtue of its location. Mathematically, it is expressed as:

PE = mgh

Where:

PE => is the potential energy.

m => is the mass of the object.

g => is the acceleration due to gravity.

h => is the height to which the object is located.

With the above formula, we can obtain the potential energy of the ball at its original height as follow:

Mass (m) = 5 kg

Height (h) = 200 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (PE) =?

PE = mgh

PE = 5 × 9.8 × 200

PE = 9800 J

Therefore, the potential energy of the ball at its original height is 9800 J

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards