Newton's First Law
The unit used to measure force.
Newtons
The term for the force that causes an object to accelerate (change)
Unbalanced force
The name given to the pair of forces that act on two interacting objects.
Action-Reaction Pair
The unit for both distance and displacement.
Meter
The general term for the rate of change of an object's position.
Speed
This is the tendency of an object to resist changes in its state of motion.
Inertia
The two variables that force is directly proportional to, according to the second law.
Mass and acceleration
The direction of the reaction force relative to the action force.
Opposite
What is a scalar quantity
Magnitude only
Is speed a scalar quantity or a vector quantity?
Scalar
What aspect in a car prevents the effects of inertia
Seatbelt
The force needed to accelerate a 2kg object accelerating at 1m/s
2N
The force the ground exerts on you as you walk, allowing you to move forward.
What is a vector quantity
True or False: If you run a complete loop around a park and end up exactly where you started, your average velocity is zero.
True (displacement is zero)
An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction, unless acted upon by an unbalanced force.
Newton's First Law
The reason a small shopping cart is easier to push than a full one, assuming the same force is applied.
The greater the mass, the greater the force required/lower the acceleration
What is the opposing force when you bounce a basketball on the ground
The ball bouncing back up
A runner completes one lap on a 400m track. What is their displacement?
0m
The definition of average speed (in terms of distance and time.
Total distance/total time
Describe the motion of a ball thrown straight up when it reaches its highest point.
If you double the mass of an object but keep the force the same, what happens to the acceleration?
Halves
A rocket pushes hot exhaust gases down. What is the direction of the reaction force that pushes the rocket up?
Upward
Is distance a scalar or vector quantity?
Scalar
The average speed of a car that travels 100km/hr in 2 hours
50km/hr