# Work, Energy and Power-Kinetic Energy (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 3 of 5

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## Question number: 1

» Work, Energy and Power » Kinetic Energy

MCQ▾

### Question

A slow moving electron collides elastically with a hydrogen atom at rest. The initial and final motions are along the same straight line. What fraction of electron’s kinetic energy is transferred to the hydrogen atom? The mass of hydrogen atom is 1850 times the mass of electron.

### Choices

Choice (4) Response

a.

2.17 %

b.

21.7%

c.

0.217%

d.

0.0217 %

## Question number: 2

» Work, Energy and Power » Kinetic Energy

MCQ▾

### Question

A body of mass M splits into two parts αM and (1 - a) M by an internal explosion, which generates kinetic energy T After explosion if the two parts move in the same direction as before, their relative speed will be –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 3

» Work, Energy and Power » Kinetic Energy

MCQ▾

### Question

Which of the following hold when two particles of masses m 1 and m 2 undergo elastic collision?

(1) When m, = m 2 and m 2 is stationary, there is maximum transfer of kinetic energy in head on collision

(2) When m i = va 2 and m 2 is stationary, there is maximum transfer of momentum in head on collision

(3) When m l > > m 2 and m 2 is stationary, after head on collision m 2 moves with twice the velocity of m 1

(4) When the collision is oblique and m 1 = m 2 with m 2 stationary, after the collision the particle move in opposite directions.

Select the correct answers and mark it according to the following codes

### Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct

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