Force basics
What is the unit of force?
Newton (N)
What is another name for Newton's First Law?
Law of Inertia
What equation links force, mass and acceleration?
F = ma
What force opposes motion between surfaces?
Friction
What is the closest star to Earth?
Sun
Is force a scalar or vector quantity?
Vector
Which object has greater inertia: a basketball or a bowling ball?
Bowling Ball
If force increases and mass stays constant, what happens to acceleration?
Increases
What force slows a parachutist as they fall?
Air Resistance
Which planet is known as the Red Planet?
Mars
What is the force that pulls objects towards Earth?
Gravity
What is required for a cart to move up an incline.
An unbalanced force
What is the acceleration of a 2 kg object pushed with a force of 10 N? (Include units)
5m/s2
Why do seatbelts work according to Newton's First Law?
Inertia
What force keeps planets in orbit around the Sun?
Gravity
What is the net force if 10 N acts right and 4 N acts left?
6 N right
What property causes objects to resist changes in motion?
Inertia
What force is needed to accelerate a 4 kg object at 3 m/s²? (Include units)
12N
Why is it harder to accelerate a loaded truck than an empty truck?
Greater mass
What is the name of our galaxy?
Milky Way
What force keeps a book from falling through a table?
Normal Force
What is the resultant force on an object travelling at a constant velocity?
According to Newton's Second Law, acceleration is directly proportional to what?
Force
What force slows down a moving car when the brakes are applied?
Friction
Which planet has the most moons?