Impulse-Momentum

Front

What is impulse?

Back

Impulse is defined as the change in momentum of an object when a force is applied over a period of time. It is equal to the product of the average force and the time duration over which the force acts.

Front

What is the formula for momentum?

Back

Momentum (p) is calculated using the formula: p = m * v, where m is mass and v is velocity.

Front

If a runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s, what is his mass?

Back

74.4 kg

Front

What happens to the momentum of an object at rest?

Back

An object at rest has a momentum of 0 kg m/s because momentum is the product of mass and velocity, and velocity is zero.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object. This relationship is expressed as: Impulse = Δp = p_final - p_initial.

Front

What is the effect of a force applied over a longer time on impulse?

Back

Applying a force over a longer time increases the impulse, resulting in a greater change in momentum.

Front

When an egg is thrown at a wall and a bed sheet, where is the force of impact greater?

Back

The force of impact is greater against the wall because the wall provides a harder surface compared to the bed sheet.

Front

In a collision between a bug and a truck, what can be said about the forces experienced by both?

Back

The force of impact is the same for both the bug and the truck due to Newton's third law of motion.

Front

What is the significance of the impulse-momentum theorem?

Back

The impulse-momentum theorem states that the impulse experienced by an object is equal to the change in its momentum, which helps in analyzing collisions and impacts.

Front

What is the unit of impulse?

Back

The unit of impulse is Newton-seconds (Ns) or kg m/s.