![]() What is the (a) force on the particle for t 4 s, 0 < t < 4 s? (b) impulse at t = 0 and t = 4 s? (Consider one-dimensional motion only). Figure shows the position-time graph of a particle of mass 4 kg. I = Δp is the formula of finding Impulse. What is the formula for finding Impulse? (2 marks)Īns. The second law states that the rate of change of momentum of an object is directly proportional to the force applied, or, for an object with constant mass, that the net force on an object is equal to the mass of that object multiplied by the acceleration. What is Newton's Second Law? (2 marks)Īns. The symbol of Impulse is I and its SI unit is N. ![]() What is the SI Unit of impulse? (2 marks)Īns. While playing Carroms, the striker hits the coin for a very short time then to returns back or falls in the pocket. Kickstarting a bike, when we kick for a small period while starting a bike is an example of impulse force The bat is in contact with the ball for very little time but changes its course quite significantly. A few examples -īatsman hitting the ball while playing cricket. Impulse is any force that for a very small amount of time. What are some daily life examples of impulse? (2 marks)Īns. Impulse of a force for a given time is equal to the total change in momentum of the body during the given time. If the force of an impulse is changing with time, then the impulse is measured by finding the area bound by the force-time graph for that force. The impulse of a force is a vector quantity and its SI unit is 1 Nm. Impulse is defined as the product of force and the small time interval for which it acts. Forces acting for short duration are called impulsive forces. What is Impulse in Physics? (2 marks)Īns. If the duration is small, then the impact of the force increases and may cause severe injury to the occupants.Ques. If the duration is increased, then the impact of force is reduced. When the airbag inflates, it increases the duration required to stop the momentum of the passenger or the driver. This reduces the force with the compartments push or pull each other, and severe jerks are avoided.Īirbags are present in cars to minimize the damage to a driver or a passenger during a collision. Hence, a smaller force is felt by the passengers traveling on the vehicle during jerks.Ĭompartments of trains are provided with buffers.īuffers increase the duration of jerks during the shunting of the train. Shock absorbents provided in the vehicles increase the duration of the jerks, thus decreasing the rate of change of momentum. Vehicles like cars, buses, and bikes are provided with shock absorbent. Thus, he exerts a smallerįorce to stop the baseball and save his hands from getting hurt.Ģ. Vehicles like cars, buses, and bikes are provided with shock absorbents. By moving his hands backward, theįielder increases the duration of making the catch. ![]() His hands experience an impulse that is equal to the product of the forceĪpplied and the time taken to catch the ball. The illustrations will make this statement clear.ġ. A fielder moves his hands backward while catching a baseball.Ī fielder moves his hands backward while catching a ball because, while doing so, If the time interval of an impulse is large, the force exerted will be small. ![]() J = F Δ t = m a Δ t J=F\Delta t=\text F 1 Δ t 1 = F 2 Δ t 2 . For example, if an external force is applied on a freely suspended string, then the applied force is known as impulse force only when it is large as compared to the force of gravity (weight of the string) and the tension that develops in it. The force ( F ) is said to be an impulse force if it is large as compared to the other forces present in the reference frame.
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