CBSE
Two blocks of masses m1 and m2 are connected by a spring of spring constant k. The block of mass m2 is given a sharp empulse so that it acquires a velocity v0 towards right. Find the maximum elongation that the spring will suffer.
v0
v0
v0
v0
A wheel of radius 0.4 m can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung. An angular acceleration of 8 rad-s-2 produced in it due to the torque. Then, moment of inertia of the wheel is (g =10 ms-2 )
2 kg-m2
1 kg-m2
4 kg-m2
8 kg-m2
Progressive waves are represented by the equation y1 = a sin (ωt - x ) and y2 = bcos (ωt - x ). The phase difference wave is
0o
45o
90o
180o
An object start sliding on a frictionless inclined plane and from same height another object start falling freely.
both will reach with same speed
both will reach with same acceleration
both will reach in same time
None of the above
Two rigid bodies A and B rotate with rotational kinetic energies E, and E, respectively. The moments of inertia of A and B about the axis of rotation are IA and IB respectively.
If and EA = 100 = EB, the ratio of angular momentum (LA ) of A to the angular momentum ( LB ) of B is
25
5/4
5
1/4
Match the following
Angular momentum | 1. [M-1 L2 T-2 ] |
B. Torque | 2 [M1 L2 T-2 |
C. Gravitational constant | 3.[M1 L2 T-2] |
D. Tension | 4.[M1 L2 T-1] |
C- 2, D - 1
A - 4, B - 3
A - 3, C -2
B-2, A - 1
A tangential force acting on the top of sphere of mass m kept on a rough horizontal place as shown in figure
If the sphere rolls without slipping, then the acceleration with which the centre of sphere moves, is
A solid sphere is set into motion on a rough horizontal surface with a linear speed v in the forward direction and an angular speed in the anticlockwise direction as shown in figure. Find the linear speed of the sphere when it stops rotating and ω =
The working principle of a ball point pen is
Bernoulli's theorem
surface tension
gravity
viscosity
If applied torque on a system is zero, i.e.,Τ = 0 , then for that system
ω = 0
α = 0
J = 0
F = 0