Work, KE and PE Part 2

If an object has a mass of 5 kg and a velocity of 10 m/s, what is its kinetic energy?

• 100 J

• 250 J

• 500 J

• 250 N

Tags

NGSS.HS-PS3-2

What is the formula to calculate potential energy?

• PE = 1/2kx^2

• PE = mgh

• PE = 1/2mv^2

• PE = Fd

If an object has a mass of 2 kg and a height of 4 m, what is its potential energy?

• The potential energy is 100.8 Joules

• The potential energy is 78.4 Joules

• The potential energy is 50.2 Joules

• The potential energy is 10.5 Joules

If a work of 100 J is done to move an object a distance of 5 m, what is the Force done?

• 20 J

• 20 N

• 200 J

• 20 m

What are the units for work?

• newtons (N)

• kilograms (kg)

• meters (m)

• joules (J)

Explain the relationship between kinetic and potential energy.

• Kinetic energy is always greater than potential energy.

• They have no relationship, they are completely independent forms of energy.

• They are interrelated as potential energy can be converted into kinetic energy and vice versa.

• Potential energy is only found in living organisms, while kinetic energy is only found in non-living objects.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

If a force of 10 N is applied to move an object a distance of 2 m, what is the work done?

• 5 J

• 20 J

• 200 J

• 50 J

If an object on the moon has a mass of 3 kg and is at a height of 10 m, what is its potential energy(moon gravity = 1.66)?

• 294 J

• 48.9 J

• 294 N

• 48.9 N

If a car has a kinetic energy of 55000 J and a speed of 25 m/s, what is his mass?

• 2200 Kg

• 88 Kg

• 176 Kg

• 110000 Kg

What is energy

• the product of the force applied to an object and the distance through which that force is applied

• the rate at which work is done or the rate at which energy is transferred or converted

• quantity that describes the interaction between two objects

• the capacity of a physical system to perform work