Question 1

What is the potential energy of a 0.5 kg. watermelon placed on the table 2.5 meters above the ground?

Accepted Answer

12.21 J

Answer

22.11 J

Answer

21.12 J

Question 2

Which statement is not true about potential energy?

Accepted Answer

Potential energy is greater when the object is on the ground.

Answer

Height and mass is directly proportional to potential energy.

Answer

As the mass of an object increases, its potential energy higher.

Answer

The potential l energy of an object is affected by its position .

Question 3

Calculate the kinetic energy of a 1000 kg. car travelling at 60 km/hr. Do the necessary conversion of km to m and hr. to sec.

Accepted Answer

500,000 J

Answer

5,000 J

Answer

500 J

Answer

50 J

Question 4

A 2.3 kg. coconut is placed on top of a fence and has a potential energy of 72 J. How high is the fence?

Accepted Answer

3. 19 J

Answer

13.9 J

Answer

3. 91 J

Answer

9.13 J

Question 5

Which statement is correct about kinetic energy?

Accepted Answer

The kinetic energy of an object is highest when it reaches the ground from an elevated position.

Answer

The kinetic energy of an object is at its highest when on top of a building.

Answer

The greater the mass of an object is, the higher is its velocity and kinetic energy.

Answer

Kinetic energy is the energy at rest of an object.

Question 6

Calculate the kinetic energy of a 1000 kg. car travelling at 60 km/hr. Do the necessary conversion of km to m and hr. to sec.

Accepted Answer

500,000 J

Answer

50 J

Answer

5,000 J

Answer

500 J

Question 7

What is kinetic energy?

Accepted Answer

energy in motion of an object

Answer

an object's momentum

Answer

an object's velocity

Answer

stored energy of an object

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