P2.3 Work, Energy and Momentum Flashcards
1
Q
How would you calculate kinetic energy?
A
KE=1/2 x mass x velocity2
kg m/s
2
Q
How do you calculate the velocity?
A
distance (m)/time (s)
3
Q
How do you calculate GPE (J)?
A
weight (N) x change in height (m)
4
Q
How do you calculate work done?
A
work done = force applied x distance
5
Q
What are crumple zones and why are they effective?
A
Crumple zones are areas of a vehicle that are designed to crush in a controlled way in a collision. They increase the time taken to change the momentum of the driver and passengers in a crash, which reduces the force involved
6
Q
How do you calculate momentum of a single object?
A
mass (kg) x velocity (m/s)
7
Q
How do you calculate momentum in an explosion?
A
(m1 x v1) + (m2 x v2) = 0
