Advertisements
Advertisements
प्रश्न
State Newton’s second law.
उत्तर
“The force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force”.
APPEARS IN
संबंधित प्रश्न
A bullet of mass 10 g travelling horizontally with a velocity of 150 m s−1 strikes a stationary wooden block and comes to rest in 0.03 s. Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet.
An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms−1 to 8 ms−1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.
How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 m s−2.
A hammer of mass 500 g, moving at 50 ms−1, strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?
A motorcar of mass 1200 kg is moving along a straight line with a uniform velocity of 90 km/h. Its velocity is slowed down to 18 km/h in 4 s by an unbalanced external force. Calculate the acceleration and change in momentum. Also calculate the magnitude of the force required.
If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction, it
moves upwards. Why ?
A passenger in a moving train tosses a coin which falls behind him. This shows that the motion of train is :
The acceleration produced by a force of 5 N acting on a mass of 20 kg in m/s2 is :
State Newton’s laws of motion?
Deduce the equation of a force using Newton’s second law of motion.
