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Uniform Motion

Q. If a body ...

Question

Q. If a body is accelerating:

A. It may speed up

B. It may speed down

C. It may move with same velocity

D. It may move with same speed

Options correct are:

(a) (A,D)

(b) (A,B,D)

(c) (B,C)

(d) (B,C,D)

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Solution

Dear student d is the correct answer

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Mark the correct statement(s)
(1) If speed of a body is varying, its velocity must be varying and it must have non-zero acceleration.

(2) If velocity of a body is varying, its speed must be varying.

(3) A body moving with varying velocity may have constant speed.

(4) A body moving with varying speed may have constant velocity, if its direction of motion remains constant.

Q. When a rod moves at a relativistic speed v, its mass

(a) must increase by a factor of γ
(b) may remain unchanged
(c) may increase by a factor other than γ
(d) may decrease

Q. A body is moving in a circular path such that its speed is decreasing with time. Angle between its velocity and acceleration may be

Q. If a body is charged by rubbing it, its weight
(a) remains precisely constant
(b) increases slightly
(c) decreases slightly
(d) may increase slightly or may decrease slightly

Q. A proton moving with a constant speed passes through a region of space without any change in its speed. If

E

B

represent the electric and magnetic fields respectively, this region of space may have
a)

B \neq 0, E = 0

B = 0, E \neq 0

B = 0, E = 0

B \neq 0, E \neq 0

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