Chapter 4 – Laws of Motion
Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1ms^−2 . What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be stationary relative to the belt? (Mass of the man =65kg)
27
Nov
Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1ms^−2 . What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be [...]
The figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body? What is the magnitude of each impulse?
27
Nov
The figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body? What is the magnitude of each impulse? A shell of mass 0.020kg is fired by a gun of mass 100kg. If the [...]
A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200N?
27
Nov
A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a [...]
A stream of water flowing horizontally with a speed of 15ms^−1 pushes out of a tube of cross sectional area 10^−2m^2 and hits a vertical wall near by what is the force exerted on the wall by the impact of water assuming that it does not rebound?
27
Nov
A stream of water flowing horizontally with a speed of 15ms^−1 pushes out of a tube of cross sectional area 10^−2m^2 and hits a vertical wall near by what is the force exerted on the wall by the impact of water assuming that it does not rebound? A shell of mass 0.020kg is fired by [...]
A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what is the impulse imparted to the ball? (mass of the ball is 0.15kg)
27
Nov
A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what is the impulse imparted to the ball? (mass of the ball is 0.15kg) A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what [...]
A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun?
27
Nov
A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun? A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the [...]
Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other ?
27
Nov
Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other ? Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound [...]
A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in opposite directions .
27
Nov
A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in opposite directions . A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in [...]
Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released.
27
Nov
Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released. and the tension in the string when the masses are released. Two masses 8 [...]
Two bodies of masses 10 kg and 20 kg respectively, kept on a smooth, horizontal surface are tied to the ends of a light string. A horizontal force F = 600 N is applied to (i) A (ii) B along the direction of string. What is the tension in the string in each case?
27
Nov
Two bodies of masses 10 kg and 20 kg respectively, kept on a smooth, horizontal surface are tied to the ends of a light string. A horizontal force F = 600 N is applied to (i) A (ii) B along the direction of string. What is the tension in the string in each case? horizontal [...]