If no force other than action and reaction forces act on two or more objects, no change takes place in their sum momentums in the opposite direction. For example, the momentum of two cars are the same before and after a collision. If F1 and F2 stand for action and reaction forces, the law of conservation of … Read more
My weight will be zero. If the cable of lift tears, I, lift, and weight meter will fall down in the same acceleration. In this case, the applied force by me at the weight meter will be zero. That’s why if the cable of lift tears, then my weight will be zero, i.e the weight … Read more
When you try to get down from a moving train why do you fall in the forward direction? Why need to try to get down from a moving train we get the phone in the forward direction because of the inertia of motion. The full body of us remains in dynamic condition inside the moving … Read more
The relation between the impulse of Force and change of momentum: Change of momentum = force x time. The product of force and time is defined as the impulse of force. Therefore, the impulse of force = the change of momentum.
Explain how the concept of inertia is obtained from Newton’s first law of motion? From Newton’s first law of motion, we observe that body cannot change its state by itself. If the body is at rest, it tends to remain at rest forever, and if it is in motion it tends to remain in motion … Read more
The impulse of Force is the multiplication of applied force to a body and the application time. If a force F on a body is applied taking a time t then the impulse of Force is F x t. It is generally the change in momentum minus the initial momentum.
A parachute works by harnessing the air resistance. Air resistance is a type of frictional force that works against the force of gravity on Earth. As an open parachute has a large surface area, it helps provide enough air resistance. As a result, the skydivers falling speed is decreased mostly. So, the skydiver will then … Read more
If a stationary bus starts moving, the passengers inside the bus lean backward because the passengers wish to remain in their initial state of rest. This is known as inertia. As the bus starts to move, the passengers who are initially at rest will continue to remain at rest and So, they lean backward for … Read more