M3- C7

Question 1

Newton’s first law of motion

Answer 1

An object will remain at rest or continue to one with constant velocity unless acted upon by a resultant force
It is a vector quantity

Question 2

Newton’s third law of motion

Answer 2

When two object interact, they exert equal and opposite forces on each other

Question 3

4 fundamental forces

Answer 3

Gravitational
Electromagnetic
Strong nuclear
Weak nuclear

Question 4

Momentum

Answer 4

Mass X Velocity
Kgms^-1
Vector quantity

Question 5

Closed system

Answer 5

An isolated system that has no interaction with the surrounding

Question 6

Principle of conservation of momentum

Answer 6

Within a closed system The total momentum in a specified direction remains constant, as long as no external forces act on the system

Question 7

Perfectly elastic

Answer 7

A collision in which no kinetic energy is lost

Question 8

Inelastic

Answer 8

A collision where kinetic energy is lost

Question 9

Newton’s second law

Answer 9

The net (resultant) force acting on an object is directly proportional to the rate of change of its momentum, and is in the same direction

Question 10

Force equation

Answer 10

F= kp/t
K= 1 due to setting the whole equation to 1
So F= p/t
F= (mv - mu)/ t
F= m X (v-u) t
F=ma

Question 11

Impulse

Answer 11

The product of force and the time for which the force acts
Area under force time graph
Equal to change in momentum
Ns or Kgms^-1

Question 12

Conservation of momentum

Answer 12

Linear momentum is conserved in all directions

Use a vector triangle to work it out