Newton's laws + Weight + Mass + Force + Acceleration

Question 1

What is Newton’s 1st Law?

Answer 1

An object will remain at rest or at a constant velocity unless acted on by an external, unbalanced force.

Question 2

What is Newton’s 2nd Law?

Answer 2

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to it’s mass.

Question 3

What is Newton’s 3rd Law?

Answer 3

For every action there is an equal and opposite reaction. If two objects interact, they will exert equal forces on each other.

Question 4

What is the difference between weight + mass?

Answer 4

• Weight
  = the force a body experiences due to its mass and the size of the gravitational field that its in.
• weight is a vector and is measured in Newtons by a Newton meter.
• Mass
  = the measure of the amount of matter that is contained within a three-dimensional space.
• mass is scalar and is measured in kg.
• the mass of a body is not affected by the gravitational area that its in.

Question 5

How can you investigate force + acceleration?

Answer 5

Aim:
To investigate the effect of mass on the acceleration of a trolley.
Apparatus:
Trolley, light gates, data logger, card of known length, slope or ramp and masses.
1. Set up the apparatus
2. Set up the light gates to take the velocity and time readings.
3. Record velocity and time for different values of mass on the trolley.
4. Work out the acceleration by dividing the difference in the velocity values by time taken for the card to pass between both gates.
5. If changing the mass then the slope/gradient needs to stay the same.