What is inertia of rest?
What is inertia of rest? The characteristics that a stationary body wants to be stationary is called inertia of rest.
Physics
What do you mean by the law of conservation of momentum?
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
You are standing on a weight measuring machine in a lift. If the cable of the lift tears, what is the weight that shows up on the machine?
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?
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
State the relation between the impulse of Force and the change of momentum.
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.
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
Explain the impulse of Force.
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.
How the skydivers descend safely to the ground with the help of a parachute?
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