Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 11

EASY

Stage 1 & 2

IMPORTANT

Earn 100

A stone is thrown upwards as shown in the diagram. When it reaches $P$ , which of the following has the greatest value for the stone?

50% studentsanswered this correctly

Important Questions on Work, Energy and Power

MEDIUM

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 12

A

12 H P

motor has to be operated

8 hr / day

. How much will it cost at the rate of

50 paisa / kWh

in

10 days .

MEDIUM

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 13

How much work should be done on a bicycle of mass

20 kg

to increase its speed from

2 \frac{m}{s}

to

5 \frac{m}{s}

?

MEDIUM

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 14

A bullet of mass

0.1 kg

is fired with the speed of

100 m / s

, the mass of the gun being

50 kg

. The velocity of recoil is

EASY

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 15

A bird flying in the sky has

MEDIUM

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 1

The kinetic energy possessed by a body of mass

m

moving with a velocity

v

is equal to

\frac{1}{2} m v^{2}

, provided

EASY

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 2

You lift a heavy book from the floor of the room and keep it on the bookshelf having a height of

2 m

. In this process, you take

5 s

. The work done by you will depend upon

EASY

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 3

A lorry and a car moving with the same $K E$ are brought to rest by applying the same retarding force, then

EASY

Stage 1 & 2

IMPORTANT

Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Work, Energy and Power>Target Exercise>Q 4

A man starts walking from a point on the surface of the earth (assumed smooth) and reaches diagonally opposite point. What is the work done by him?