A 0.145 kg baseball is flying at a height of 2.50 m. How much potential energy
1 answer:
Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. It can be calculated as its weight times the height. This is:
Where:
- W is the weight of the object
- m is the mass
- g is gravitational acceleration
- h is the height
Evaluating:
R/ The ball has 3.5525 J of potential energy.
You might be interested in
Answer:
35.6 N
Explanation:
We can consider only the forces acting along the horizontal direction to solve the problem.
There are two forces acting along the horizontal direction:
- The horizontal component of the pushing force, which is given by
with
- The frictional force, whose magnitude is
where , m=8.2 kg and g=9.8 m/s^2.
The two forces have opposite directions (because the frictional force is always opposite to the motion), and their resultant must be zero, because the suitcase is moving with constant velocity (which means acceleration equals zero, so according to Newton's second law: F=ma, the net force is zero). So we can write: