1
A 4 kg ball moves at 2 m/s. What is its momentum?
8 kg·m/s
What is the formula for impulse?
Impulse = Force × Time
Why do gymnasts use mats when landing?
To increase time of impact and reduce force
If a truck and a bicycle move at the same speed, which has more momentum?
The truck
What is the momentum of a 5 kg object at rest?
0 kg·m/s
What happens to momentum if velocity doubles?
Momentum also doubles
What safety gear uses impulse to protect athletes?
Helmets, pads, gloves
How is impulse related to momentum?
Impulse equals change in momentum
How do airbags relate to impulse?
They extend impact time to reduce force.
What is the unit for impulse?
Newton-second or Ns
Why should you bend your knees when you jump down from something?
To increase impact time and reduce the force on your legs
A 10 N force acts for 2 seconds. What is the impulse?
20 Ns
If a 5 kg object slows from 10 m/s to 0 in 2 seconds, what is the average force?
25 N
If the time of impact increases, what happens to the force?
The force decreases
In boxing, why do gloves reduce injury?
They increase impact time and spread out the force.