3 years ago

What is mechanical energy?

2 answers:

8 0

Answer:

In physical sciences, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.

Explanation:

stepan [7]3 years ago

4 0

Answer:

Mechanical Energy is Kinetic energy + the Potential Energy.

Explanation:

ME=KE+PE

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4 years ago

What is a cars acceleration in the direction of motion when velocity changes from 20. M/s to 60. M/s in 10. S

brilliants [131]

Answer:

Acceleration, $a=4\ m/s^2$

Explanation:

Given that,

Initial velocity, u = 20 m/s

Final velocity, v = 60 m/s

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A sled that has a mass of 8 kg is pulled at a 50 degree angle with a force of 20 N. The force of friction acting on the sled is

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$F=mg sin \theta- F_f =(8 kg)(9.8 m/s^2)(sin 50^{\circ})-2.4 N=57.7 N$

And the acceleration is given by Newton's second law:

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2) Normal force

The normal force acting on the sled is equal to the component of the weight perpendicular to the incline, therefore:

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