EASY

9th CBSE

IMPORTANT

Earn 100

The work done by a force acting obliquely is given by the formula: $W = F \cos θ \times s$ . What will happen to the work done if angle $θ$ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant?

Important Questions on Work and Energy

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 73

What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 74

In which of the following case the work done by a force will be maximum?

When the angle between the direction of force and direction of motion is $0^{o}$ or $90^{o}$ .

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 75

How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 76

A man is instructed to carry a package from the base camp at B to summit A of a hill at a height of

1200 metres

. The man weighs

800 N

and the package weighs

200 N

. If

g = 10 \frac{m}{s^{2}}

, how much work does a man do against gravity?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 76

A man is instructed to carry a package from the base camp at B to summit A of a hill at a height of

1200 metres

. The man weighs

800 N

and the package weighs

200 N

. If

g = 10 \frac{m}{s^{2}}

. What is the potential energy of the package at A if it is assumed to be zero at B?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 77

When a ball is thrown vertically upwards, its velocity goes on decreasing. What happens to its potential energy as its velocity becomes zero?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 78

A man X goes to the top of a building by a vertical spiral staircase. Another man Y of the same mass goes to the top of the same building by a slanting ladder. Which of the two does more work against gravity and why?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 79

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

The work done by a force acting obliquely is given by the formula: W=Fcos⁡θ×s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant?

Important Questions on Work and Energy

Learn and Prepare for any exam you want !

The work done by a force acting obliquely is given by the formula: $W = F \cos θ \times s$ . What will happen to the work done if angle $θ$ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant?