Newtonian World

Question 0

Define Newton’s Second Law

Answer 0

The resultant force acting on an object is proportional to the rate of change of the linear momentum if that object. The net force and change in momentum are in the same direction.
F=ma

Question 1

Define Newton’s 3rd Law.

Answer 1

When body A exerts a force on body B, body B exerts a force on body A which is:
•Equal
•Opposite in direction
•Of the same type

Question 2

Define Newton’s 1st law.

Answer 2

An object will remain at rest or keep travelling at a constant velocity unless it is acted on by an external force.

Question 3

What is the equation for momentum?

Answer 3

P=mv

Question 4

What is the equation for change in momentum?

Answer 4

m1u1+m2u2=m1v1+m2v2

Question 5

What is an impulse?

Answer 5

Impulse = change in momentum. Force multiplied by time that the force acts.

Question 6

What is the equation for impulse?

Answer 6

Impulse = force x change in time, or I (Ft) = mv-mu

Ft=mv so F=mv/t

Question 7

What is the principle of conservation of momentum?

Answer 7

The total momentum before a collision or explosion is equal to the total momentum after the collision or explosion.

Question 8

What is an elastic collision?

Answer 8

A collision in which both the momentum and kinetic energy are conserved.

Question 9

What is an inelastic collision?

Answer 9

A collision in which momentum is conserved but kinetic energy is transformed into other forms of energy.

Question 10

Define a force pair.

Answer 10

Forces pushing against each other to create motion.

Question 11

Define momentum.

Answer 11

The mass of an object multiplied by its velocity.