6. Further Mechanics

Question 1

Conservation of momentum

Answer 1

Assume no extended forces act momentum is always conserved total momentum before a collision is equal to after the collision

Question 2

Impulse

Answer 2

Change in momentum

Question 3

Impulse formula

Answer 3

Force times by the changing time is equal to change momentum

Question 4

How to find impulse from a graph

Answer 4

Find the area under a force time graph

Question 5

Kinetic energy formula in terms of momentum

Answer 5

Em= p^2 /2m

Question 6

What is conserved in an elastic collision?

Answer 6

Assume no external forces are acting momentum is conserved and so is kinetic energy

Question 7

In the last collision

Answer 7

Total kinetic energy is less after the collision and momentum is conserved

Question 8

Perfect in elastic collision

Answer 8

All kinetic energy has lost and the two objects stick together in a collision

Question 9

Radian

Answer 9

Unit of measurements of angles about 57.3 degrees

Question 10

Angular displacement

Answer 10

Angle for which a point has been rotated in a given direction

Question 11

Angle of velocity

Answer 11

The angle an object rotates through per second

Question 12

A centripetal force produces what?

Answer 12

Centripetal acceleration

Question 13

What is centripetal Force

Answer 13

The force that keeps the object moving in a circle, remove the forks and object the flight off at a tangent

Question 14

What is the direction of centripetal acceleration?

Answer 14

Directed towards the centre of the circle