Which of the following is the equation of a uniformly accelerated motion?

(A)

V^{2}=ut+2as

(B)

V^{2}=u^{2}+2as

(C)

V^{2}=u^{2}+a^{2}t^{2}

(D)

V^{2}=u^{2}-a^{2}t^{2}

Question-2

Figure 1.33 shows the displacement-time graphs (a) and (b) for a body moving a straight path drawn on the same scales. Then

(A)

slope of line in (a) is greater than the slope of line in (b)

(B)

slope of line in (b) is greater than the slop of line in (a)

(C)

slope of line in (a) is equal to the slope of line in (b)

(D)

nothing can be said about the slopes

Question-3

The SI unit for angular velocity is

(A)

m/s

(B)

rad

(C)

rad/s

(D)

m/rad

Question-4

The acceleration of a body projected upwards with a certain velocity is

(A)

9.8 m/s^{2}

(B)

-9.8 m/s^{2}

(C)

zero

(D)

insufficient data

Question-5

The slope of the velocity-time graph gives

(A)

distance travelled

(B)

Displacement

(C)

Speed

(D)

Acceleration

Question-6

The physical quantity corresponding to the rate of change of displacement is

(A)

speed

(B)

velocity

(C)

acceleration

(D)

retardation

Question-7

Which of the following physical quantity is different from others ?

(A)

speed

(B)

distance

(C)

energy

(D)

average velocity

Question-8

A car starts from rest and travels a distance 800m in 20s with uniform acceleration.Acceleration of the car after 20 s is

(A)

4ms^{-2}

(B)

8ms^{-2}

(C)

6ms^{-2}

(D)

5ms^{-2}

Question-9

A stone tied to a string is whirled in a circle. As it is revolving, the rope suddenly breaks. Then

(A)

the stone files off tangentially

(B)

the stone moves radially inward

(C)

the stone moves radially outward

(D)

the motion of the stone depends upon its velocity

Question-10

A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance X_{1} , in the first 10 s and distance X_{2} , in the remaining 10 s, then which of the following is true ?

(A)

X_{1} = 2X_{2}

(B)

X_{1} = X_{2}

(C)

X_{1} = 3X_{2}

(D)

none of these

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