A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?

Physics

2 answers:

Ahat [919]2 years ago

8 0

Answer:

28 J

Explanation:

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.

In physics, mechanical energy (Emech) is the energy associated with the motion and position of an object usually in some force field.

Therefore:

ME = KE + PE = 25 + 3 = 28 J

daser333 [38]2 years ago

5 0

Answer:

28j

Explanation:

You might be interested in

An electric device, which heats water by immersing a resistance wire in the water, generates 50 cal of heat per second when an e

Oksi-84 [34.3K]

Answer:

0.69 ohm

Explanation:

Heat generated per second, H = 50 cal/s

Potential difference, V = 12 V

Let R is the resistance of coil.

The formula for the heat is given by

$H = \frac{V^{2}}{R}t$

$50\times 4.186 = \frac{12^{2}}{R}\times 1$

R = 0.69 ohm

3 0

2 years ago

Some children are practicing catching baseballs. The coach tosses the ball into the air and hits the ball with his bat. The ball

vova2212 [387]

Answer:

Work is defined as the amount of movement done by a force, and it can be calculated as:

W = f*d

where W is the work, f is the force and d is the distance.

So when the coach hits the ball, he is appliying some force in the ball (via the bat) that impulses the ball briefly (we can considerate that the force is only applied in a differential of time dt)

But we have a force applied and a displacement of the ball, so yes, the bat does work on the ball.

8 0

2 years ago

Read 2 more answers

A nonuniform beam 4.50 m long and weighing 1.40 kN makes an angle of 25.0° below the horizontal. It is held in position by a fri

liubo4ka [24]

Answer:

$T = 7.64 kN$