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
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.
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.
Explain the meaning of the following equation :
F = m x a
where symbols have their usual meanings
A body of mass 5 kg is moving with a velocity of 10 m/s. A force is applied to it so that in 25 seconds, it attains a velocity of 35 m/s. Calculate the value of the force applied.
A car of mass 2400 kg moving with a velocity of 20 m s-1 is stopped in 10 seconds on applying brakes. Calculate the retardation and the retarding force.
Name the law involved in the following situation:
a body of mass 5 kg can be accelerated more easily by a force than another body of mass 50 kg under similar conditions.
If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction, it
moves upwards. Why ?
The acceleration produced by a force of 5 N acting on a mass of 20 kg in m/s2 is :
Which of the following situations involves the Newton's second law of motion?
Newton’s III law is applicable
