The impulse required is greatest when the ball is caught and then thrown back because the impulse required equals the change in momentum.
Q. Why is impulse J?
In classical mechanics, impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity. A resultant force causes acceleration and a change in the velocity of the body for as long as it acts.
Table of Contents
- Q. Why is impulse J?
- Q. Which skateboard has the greatest impulse?
- Q. What happens the first time Dr Hewitt lifts the bowling ball near his teeth and lets go?
- Q. Would it be a dangerous mistake for a bungee jumper to use steel cable rather than an elastic cord?
- Q. What impulse occurs when an average force of 10?
- Q. What average force is exerted on a 25g egg?
- Q. Which has more inertia a stationary bowling ball or a rolling tennis ball which has more momentum explain which has more momentum a stationary bowling ball or an identical rolling bowling ball?
Q. 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).
Q. What happens the first time Dr Hewitt lifts the bowling ball near his teeth and lets go?
Why does the bowling ball behave the way it does the first time Dr. Hewitt lifts the bowling ball near his teeth and lets go? All of the initial energy of the ball was converted completely back to potential energy when the ball returned.
Q. Would it be a dangerous mistake for a bungee jumper to use steel cable rather than an elastic cord?
Why would it be dangerous mistake for a bungee jumper to use a steel cable instead of an elastic cord. the steel cord will stretch only a little, resulting in a short time of stop and a corresponding large force. The force will be different because the time of extension is different for each of the surfaces.
Q. What impulse occurs when an average force of 10?
Physics the fourth
| A | B |
|---|---|
| What impulse occurs when an average force of 10 N is exerted on a cart for 2.5 s? | 10 N x 2.5 s= 25 Nxs |
| What change in momentum did the cart undergo? | 25 kg x m/s |
| If the mass of the cart is 2 kg and the cart is initially at rest, calculate it’s final speed. | 12.5 m/s |
Q. What average force is exerted on a 25g egg?
So, the average force exerted on the egg is (-0.5 N).
Q. Which has more inertia a stationary bowling ball or a rolling tennis ball which has more momentum explain which has more momentum a stationary bowling ball or an identical rolling bowling ball?
The greater the inertia (mass) of an object, the more force is needed to accelerate it at a given rate. Since inertia is simply just a measurement of mass, the bowling ball has a higher mass, thus inertia, than the tennis ball.
