NEET Physics: Questions 846 - 849 of 2098

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Question number: 846

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 50kg resting on a smooth inclined plane is connected by a massless inextensible string passing over a smooth pulley, at the top of the inclined plane have another mass of 40 kg as shown in the figure. The distance through which 50 kg mass fall in 10 sec will be - (The angle of the inclined plane is 30°)

Body of mass 50kg is on rest at inclined plane

Body of Mass 50kg Is on Rest at Inclined Plane

Formation of pulley system on the inclined plane

Choices

Choice (4) Response

a.

1.304 m

b.

81.5 m

c.

13.04 m

d.

1.63 m

Question number: 847

» 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.

T2(1α)M

b.

2Tα(1α)M

c.

2T(1α)M

d.

T(1α)M

Question number: 848

» Laws of Motion » Force and Inertia

MCQ▾

Question

A rope of length 25 m and linear density 2 kg/m is lying length wise on a horizontal smooth table. It is pulled by a force of 25 N. The tension in the rope at the point 7 m away from the point of application, will be –

Choices

Choice (4) Response

a.

11 N

b.

36 N

c.

18 N

d.

All of the above

Question number: 849

» Laws of Motion » Laws of Friction

MCQ▾

Question

Choose the correct statements -

(1) Kinetic friction is lesser than limiting friction.

(2) In rolling the surfaces at contact do not rub each other.

(3) If a body is at rest and no pulling force is acting on it, force of friction on it is zero.

(4) Kinetic friction is greater than limiting friction.

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

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

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