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

MEDIUM

9th CBSE

IMPORTANT

Earn 100

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?

Important Questions on Work and Energy

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.

HARD

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Questions Based on High Order Thinking Skills (HOTS)>Q 80

A bullet of mass

15 g

has a speed of

400 m / s

. What is its kinetic energy? If the bullet strikes a thick target and is brought to rest in

2 c m

, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Very Short Answer Type Questions>Q 1

Name the commercial unit of measurement of energy.

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Very Short Answer Type Questions>Q 2

Define kilowatt-hour.

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 4 - Work and Energy>Very Short Answer Type Questions>Q 3

Name two units of power bigger than watt.