Forces
Net Forces
Newton's First Law
Newton's Second Law
Newton's Third Law
100
A force that opposes motion
Friction
100
What is the Net Force on the object below?
0N
100
This describes laziness or resistance to change in motion
What is inertia
100
What is Newton's Second Law
The relationship between an objects force, mass, and acceleration or F=ma
100
F= ma - whose Second Law is this? (DOUBLE)
Isaac Newton
200
What force keeps the Earth in orbit?
Gravity
200
What is the net force on the object below?
0N
200
Complete the sentence. An object in motion, remains in
What is motion?
200
What two factors affect force according to Newton's Second Law?
mass and acceleration
200
The momentum of an object depends on two things - what are they? (DOUBLE)
MASS and SPEED
300
Why does earth orbit the sun instead of the sun orbiting earth?
because the sun has a larger mass
300
Which way will the box move? The length of the arrow shows magnitude (amount) of force.
To the right
300
Complete the sentence. An object at rest, remains at
Rest
300
Which would have more force, a 5,000 kg truck or a 2,500 car travelling at the same speed?
The 5,000 kg truck.
300
Correct the sentence:
SCALAR quantities have SIZE and DIRECTION but VECTOR quantities have SIZE only
Scalar - Size
Vector - size and direction
400
What is a change of speed or direction called? It's measured in m/s/s
Acceleration
400
Which way will the box move? The length of the arrow shows magnitude (amount) of force.
To the left
400
Name one force that would resists motion
What is friction, air resistance, drag?
400
What would be the force of a 100 kg person accelerating at 10 m/s/s
1,000 N
400
The gradient of a distance time graph tells you the ?
Speed or Velocity
500
What is the unit for Force?
Newtons (N)
500
What is the net force on this object?
25N Right
500
Explain in terms of Newton's First Law what will happen to the microwave on top of the car when the car stops.
It will slide forwards because it has inertia and wants to keep moving.
500
What would the acceleration be of a airplane with a force of 500,000 N and a mass of of 1,000 kg
500 m/s/s
500
On holiday on Mars, Gravity is 1.6N/kg. I have a mass of 80Kg. I eat 10kg of Pies. What is my new weight ?
144N