An Unbalanced force is needed for something to change or change direction, e.g. a moving because the forces are not equal. or the ground it stands on so doesn’t’ move.
When the brakes are applied to the bike the back seater moves forward why?
When the bike accelerates suddenly the back seater who was initially at rest experiences a force of friction at the point of contact between him and the bike. His inertia of rest tries to keep him at rest which results in a backward push. Thus, the back seater moves backwards when the bike accelerates suddenly.
There are three solids made up of aluminium, steel and wood, of the same shape and same volume. Which of them would have highest inertia?
How a karate player can break a of tiles with a single blow of his hand?
Karate player strikes the piles in a very short time in a very small area. Since, impulse, I = F × tÞ F = I/t. If ‘t’ will be very short the force becomes very large and act on smaller area .This produce enough pressure by his hand on break the brick
Momentum (Linear momentum) for moving body is defined as the product of mass and velocity. If a body is moving with velocity, v and having mass, m then momentum of body is p = m x v.