Forces

Question 1

Calculating force

Answer 1

F =ma

Question 2

Newton’s first law of motion

Answer 2

Bodies will continue to move with a uniform velocity (which includes being stationary) unless acted on by a resultant force

Question 3

Newton’s second law of motion

Answer 3

Resultant force is equal to the rate of change of momentum

Question 4

Newton’s third law of motion

Answer 4

Every force has an equal and opposite force acting on another object

Question 5

What is friction?

Answer 5

Friction is caused by rubbing.

Friction dissipates energy

Question 6

what does it mean by “friction dissipates energy”

Answer 6

That means energy changes from kinetic energy to heat energy, where it is lost to the surroundings.

Question 7

Terminal velocity

Answer 7

When the air resistance force up has grown so big that it matches the weight down there is no resultant force and therefore no acceleration. The object will travel at a constant speed.

Question 8

What is pressure?

Answer 8

Pressure is caused by forces acting on a surface.

Question 9

when the force is greater and the surface area is smaller.

what happens to the pressure?

Answer 9

The greater the pressure is produced.