Debate topices for the chater force and law of motion
CLASS 9
Answers
Explanation:
What happens when:
A bus starts suddenlyA passenger jumps out from a moving carA car enters a curved pathNumerical based on equation from the derivation of second lawA constant force acts on an object of mass 5 kg for a duration of 2 s. It increases the object’s velocity from 3 m sñ1 to 7 m s-1. Find the magnitude of the applied force. Now, if the force was applied for duration of 5 s, what would be the final velocity of the object?Rate of change of momentum is called as _________What is momentum and what is the unit of momentum?Examples of non-contact forcesWhile catching a fast moving ball, fielder gradually pulls his hand backwards. Reason?State Newton’s third law of motion and its applicationsGive examples from daily life where Newton’s third law is applicableConcept of conservation of momentum through derivationA bullet of mass 20 g is horizontally fired with a velocity 150 m s-1 from a pistol of mass 2 kg. What is the recoil velocity of the pistol?If action is always equal to the reaction, explain how a horse can pull a cart.An object of mass 100 kg is accelerated uniformly from a velocity of 5 m sñ1 to 8 m sñ1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.
Practice the examples and exercises given in the NCERT text book