- [Medium]A block placed on a rough inclined plane remains on the verge of sliding when the incline is tilted to an angle of 45 degrees with the horizontal. Wha...
- [Medium]The linear momentum of a moving particle varies with time according to the relation p = 8 + 6t, where p is in kg·m/s and t is in seconds. What is the ...
- [Hard]A pendulum hangs from the roof of a railway carriage that is accelerating horizontally, and the string settles at a steady angle of 30 degrees from th...
- [Medium]A block of weight 50 N rests on a horizontal floor while an external force of 20 N is applied on it pushing downward at an angle, with its vertical co...
- [Medium]A hockey puck sliding across rough ice with an initial speed of 12 m/s comes to rest after travelling some distance, the coefficient of kinetic fricti...
- [Easy]A wooden block resting on a rough horizontal floor just begins to slide when a horizontal pull equal to 24 N is applied, while the block weighs 60 N. ...
- [Medium]A small box slides down a smooth incline that makes an angle of 30 degrees with the horizontal surface. Ignoring friction, what is the magnitude of ac...
- [Medium]Two blocks of masses 3 kg and 2 kg are connected by a light string and pulled along a smooth horizontal table by a force of 20 N applied to the 3 kg b...
- [Medium]A person of mass 70 kg stands on a weighing scale inside a lift that accelerates upward at 2 m/s² while ascending. What reading, expressed as a force,...
- [Easy]A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at a constant speed of 4 m/s by a light string. What is the magnitude of the ce...
- [Hard]A car negotiates a curved road of radius 100 m that is banked at an angle so that no friction is needed at a particular speed. If the optimum speed is...
- [Easy]A football of mass 0.4 kg is kicked from rest and leaves the foot with a speed of 25 m/s after the foot is in contact with it for 0.05 s. What is the ...
- [Medium]Two masses of 6 kg and 4 kg hang from the two ends of a light inextensible string passing over a frictionless pulley. What is the acceleration of the ...
- [Hard]A bucket of water is whirled in a vertical circle of radius 0.9 m, and at the highest point the water just does not fall out. What is the minimum spee...
- [Hard]Rain falls vertically and is collected by a stationary open cart, with water arriving at a steady rate of 2 kg/s landing with a downward speed of 5 m/...
- [Easy]When a rifle of large mass fires a small bullet, both experience forces of the same magnitude, yet the bullet flies forward fast while the rifle barel...
- [Medium]A stationary object of mass 5 kg suddenly explodes into two fragments of masses 2 kg and 3 kg, and the 2 kg fragment flies off at 9 m/s. What is the s...
- [Medium]A cricket ball of mass 0.16 kg moving horizontally is struck by a bat, and its velocity changes from 30 m/s to 50 m/s in the opposite direction in 0.0...
- [Easy]A passenger standing in a bus suddenly lurches forward when the moving bus comes to an abrupt halt at a signal. Which principle best explains this sud...
- [Easy]In rocket propulsion, thrust arises primarily due to:...
- [Medium]A horizontal force just sufficient to start motion of a 20 kg crate on a rough floor is 60 N. Once in motion, a constant force of 50 N keeps it moving...
- [Medium]Two blocks of masses 4 kg (top) and 6 kg (bottom) are in contact on a frictionless surface. A horizontal 30 N force is applied to the 6 kg block. What...
- [Medium]In an accelerating car (a = 4 m/s² forward), a pendulum bob of mass 0.2 kg hangs at equilibrium making an angle θ with the vertical. Neglect air resis...
- [Medium]A 5 kg block rests on a rough incline of angle 30°. Coefficient of static friction is 0.4. Will the block remain at rest? (g = 10 m/s²)...
- [Easy]A 0.15 kg ball moving at 20 m/s is stopped by a catch in 0.05 s. What average force is exerted by the hand?...
- [Medium]Two masses 3 kg and 5 kg connected by a light inextensible string are pulled on a frictionless surface by a 32 N force applied on the 5 kg mass. Find ...
- [Easy]A 2 kg block is pushed across a rough horizontal surface by a 16 N force. It moves at constant velocity. What is the coefficient of kinetic friction? ...
- [Hard]A horizontal force F just prevents a 10 kg block from sliding down a rough 37° incline (μ_s = 0.5). Find minimum F (g = 10 m/s²)....
- [Medium]A 0.5 kg stone tied to a string moves in a horizontal circle of radius 1.2 m at constant speed 6 m/s. Find tension in the string....
- [Easy]In a light frictionless pulley system, masses 3 kg and 7 kg are released from rest. Acceleration of system (g = 10 m/s²)?...
- [Hard]Two blocks connected by an inextensible string over a frictionless pulley: m1 = 8 kg on a frictionless horizontal table, m2 = 2 kg hanging. Find the a...
- [Easy]Which of the following situations best illustrates Newton’s First Law of Motion?...
- [Easy]According to Newton’s Third Law, when a swimmer pushes water backward with her hands, the water:...
- [Easy]A 6 kg block on a smooth horizontal surface is pulled by a constant horizontal force producing an acceleration of 3 m/s². What is the magnitude of the...