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Class XI Physics Laws of Motion Quiz 4
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A block rests on a rough plane whose inclination θ to the horizontal can be varied. Which of the following graphs indicates how the frictional force F between the block and the plane varies as θ is increases –
A stationary body of mass m is slowly lowered onto a massive platform of mass M (M>>m) moving at a speed V0 = 4 m/s as shown in fig. How far will the body slide along the platform? ( µ = 0.2 and g = 10 m/s2)
A ball moving with a velocity u strikes a wall moving towards the ball with a velocity v as shown in the figure. An elastic impact occurs. Then work done by wall during collision is........... Consider the mass of the wall to be infinitely.
A smooth sphere of mass m strikes a second sphere of mass 2m which is at rest. After the collision their directions of motion are at right angles. Then coefficient of restitution is-
Two blocks A(3kg) and B(6kg) are connected by a spring of stiffness 512 N/m and placed on a smooth horizontal surface. Initially the spring has its equilibrium length. Velocities 1.8m/s and 2.2 m/s are imparted to A and B in opposite direction. The maximum extension in the spring will be –
An impulse changes the velocity of a particle from to . Kinetic energy gained by the particle is –
A rod of length l slides down along the inclined wall as shown in figure. At the instant when the speed of end A is v, speed of B is-
Two cars having masses m1 and m2 move in circles of radius r1 and r2. If they complete the circle in equal time. The ratio of their angular speeds ω1/ω2 is-
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May 24JEE & BITSAT
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