Free Printable ROTATIONAL DYNAMICS

1.

In magnitude, centripetal force is given as

a)

mr $\omega^2$

b)

$mv^2$ /r

c)

both a and b

2.

Centrifugal force ias a ------- force.

a)

pseudo

b)

real

c)

resultant of real force

d)

cannot be defined

3.

For a horizontal circular road µ_s is

a)

normal force

b)

max. possible speed

c)

coefficient of friction

d)

centripetal force

4.

Calculate vmin for a vehicle taking rounds inside a well of death min with radius 5 cm and µs = 0.5 (g = 10 m/s²)

a)

5 m/s²

b)

0.5 m/s²

c)

10 m/s²

d)

1 m/s²

5.

For a curved road banked road, safe speed is given as

a)

V_s = $\sqrt[]{\frac{N}{rg}}$

b)

Vs= $\sqrt[]{r^2g\tan\theta}$

c)

Vs = $\sqrt[]{rg\tan\theta}$

d)

Vs = $\sqrt[]{g\ \tan\theta}$

6.

The force which balances the component of normal reaction

a)

N sin $\theta$

b)

$f_{s\ }$ cos $\theta$

c)

N

d)

mg

7.

If angle of banking is more than or equal to $45^0$ , maximum speed would be

a)

0

b)

$\infty$

c)

$\theta$

d)

cannot be predicted

8.

For a rolling object, the ratio for Transational K.E: Rotationa K.E. Total K.E. is

a)

2:3:5

b)

1:4:5

c)

4:1:5

d)

3:2:5

9.

In a conical pendulum time period depends on

a)

length of the string

b)

gravity

c)

$\theta$ (angle)

d)

angular speed( $\omega$ )

ROTATIONAL DYNAMICS

Total questions: 9

Worksheet time: 5mins

Similar Resources on Wayground