Contents

- 1 Why is a force that is applied for a short time more effective in karate?
- 2 What are 2 ways to increase impulse?
- 3 How does impulse differ from force?
- 4 When you are in the way of a moving object and a collision is sure to occur Are you better off decreasing its momentum over a short time or over a long time explain?
- 5 Why is it less damaging if you fall on a mat than if you fall on a solid floor?
- 6 What has the greatest impulse?
- 7 Why is a punch more forceful with?
- 8 Does force produce acceleration?
- 9 When two objects collide what is always conserved?
- 10 What exactly is impulse?
- 11 What is difference between momentum and impulse?
- 12 Which skateboard has the greatest impulse?
- 13 Does inertia increase with speed?
- 14 When two vehicles collide momentum is conserved?
- 15 How does Dr Hewitt break the piece of wood?

## Why is a force that is applied for a short time more effective in karate?

Answer: The average force is increased. A force that is applied for a short time is able to deliver a high impact force for the same change in momentum. If the time is small the force will be greater Ft=mv.

## What are 2 ways to increase impulse?

2 ways through which the impulse can be increased are: 1) Increasing the force 2 ) increasing the time over which the force acts.

## How does impulse differ from force?

How does an impulse differ from force? An impulse is force times the time that force is applied. A force is a push or a pull.

## When you are in the way of a moving object and a collision is sure to occur Are you better off decreasing its momentum over a short time or over a long time explain?

The amount of force you will feel is the same as the force you apply to the object. So if you decrease its momentum over a long time, less force is needed to act. So, you would be “ better off ” exerting a small force for a long time. 5.

## Why is it less damaging if you fall on a mat than if you fall on a solid floor?

Why is it less damaging if you fall on a mat than if you fall on a solid floor? The time to come to a stop will be longer on the mat. This means a longer time to stop and a smaller force. No, momentum is not conserved, for an impulse acts on the cannonball.

## What has the greatest impulse?

Explain. Balloon B has the greatest impulse. Impulse is equal to momentum change.

## Why is a punch more forceful with?

Why is a punch more forceful with a bare fist than with a boxing glive? Because with a bare hand you have more force than with a boxing glove. 3) because when you caught the ball there was a greater force and when you through it back there also was a greater force.

## Does force produce acceleration?

Acceleration and velocity Newton’s second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.

## When two objects collide what is always conserved?

In collisions between two isolated objects momentum is always conserved. Kinetic energy is only conserved in elastic collisions.

## What exactly is impulse?

Impulse is the change of momentum of an object when the object is acted upon by a force for an interval of time. So, with impulse, you can calculate the change in momentum, or you can use impulse to calculate the average impact force of a collision.

## What is difference between momentum and impulse?

Momentum is the product of mass and velocity. However, impulse represents the change of momentum of a system over a certain period of time.

## Which skateboard has the greatest impulse?

The impulse is given by the magnitude of the force times the time interval: We can see that the force F of the 4 skateboard is always the same (33 N), this means that the skateboard with greatest impulse is the one with the largest time interval, so skateboard C).

## Does inertia increase with speed?

4 Answers. For both interpretations, the answer is ‘yes’ since force still acts in an opposite force on anything which has mass. As you accelerate, your velocity increases and therefore mass will increase. The greater the mass, the greater the inertia.

## When two vehicles collide momentum is conserved?

An inelastic collisions occurs when two objects collide and do not bounce away from each other. Momentum is conserved, because the total momentum of both objects before and after the collision is the same. However, kinetic energy is not conserved.

## How does Dr Hewitt break the piece of wood?

How does Dr. Hewitt break the piece of wood? He causes a change in momentum of his hand over a short period of time. Increase the change in momentum, and decrease the time duration.