Force and Momentum

Question 1

What’s meant by a body’s momentum?

Answer 1

It is the product of that body’s mass and its velocity.

Question 2

What’s Newton’s 1st Law?

Answer 2

Any object that is at a constant velocity will remain so unless an external force acts upon it.

Question 3

What’s Newton’s 2nd Law?

Answer 3

The rate of change of a body’s momentum is proportional to the force applied and it will act in the direction of the applied force

Question 4

What’s Newton’s 3rd Law?

Answer 4

If an object A exerts a force on object B, object B will exert a force on object A that is equal in magnitude but opposite in direction to the applied force.

Question 5

What’s Newton’s Law of Universal Gravitation?

Answer 5

That all point masses in the universe are attracted to each other by a force, along the line of their centres, that is proportional to the product of their masses and inversely proportional to the square of the distance between them.

Question 6

What is required for weightlessness to be experienced?

Answer 6

All forces must be balanced out.

Question 7

What’s a force?

Answer 7

Anything that causes an object to move (direction) or change velocity.