Systems of Particles and Rotational Motion Test

Result

Systems of Particles and Rotational Motion Test - 23

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

In a bicycle the radius of rear wheel is twice the radius of front wheel. If r_F and r_r the radius, v_F and v_r are speed of top most points of wheel respectively then...

A
v_r = 2v_F

B
v_F = 2v_r

C
v_F = v_r

D
v_F > v_r
Question 2
4 / -1

If the angular momentum of any rotating body increases by 200%, then the increase in its kinetic energy will be.....

A
400%

B
800%

C
200%

D
100%

Solution
Question 3
4 / -1

The M.I. of a body about the given axis is 1.2 kgm² initially the body is at rest. In order to produce a rotational kinetic energy of 1500 J. an angular acceleration of 25 rad/sec² must be applied about that axis for duration of ....

A
4 sec

B
2 sec

C
8 sec

D
10 sec

Solution
Question 4
4 / -1

An automobile engine develops 100kw when rotating at a speed of 1800 r.p.m. what torque does it deliver ?

A
350 Nm

B
440 Nm

C
531 Nm

D
628 Nm

Solution
Question 5
4 / -1

The moment of inertia of two rotating bodies A and B are I_A and I_B.(I_A > I_B) and their angular momentum are equal. If their K.E. be K_A and K_B respectively then....

A
K_A, K_B

B
K_B/K_A > 1

C
K_A/K_B = 1

D
K_B/K_A = 1/2

Solution
Question 6
4 / -1

If distance of the earth becomes three times that of the present distance from the sun then number of days in one year will be ....

A
365 × 3

B
365 × 27

C

D

Solution
Question 7
4 / -1

Two identical hollow spheres of mass M and radius R are joined together and the combination is rotated about an axis tangential to one sphere and perpendicular to the line connecting their centers. The moment of inertia of the combination is ________.

A

B

C

D
Question 8
4 / -1

If rotational K.E. is 50% of translational K.E. then the body is .....

A
Ring

B
solid cylinder

C
Hollow sphere

D
Solid sphere

Solution
Question 9
4 / -1

The moment of inertia of a meter scale of mass 0.6kg about an axi perpendicular to the scale and passing through 30 cm position on the scale is given by (Breath of scale is negligible). ________

A
0.104 mkg²

B
0.208 mkg²

C
0.074 mkg²

D
0.148 mkg²
Question 10
4 / -1

A constant torque of 1500 Nm turns a wheel of moment of inertia 300 kgm² about an axis passing through its centre the angular velocity of the wheel after 3 sec will be.......... rad/sec

A
5

B
10

C
15

D
20

Solution