Force and Motion Review
If an object is still, are there forces acting on it? Yes! There are balanced forces acting on it! Gravity is a force acting on all objects all the time!
True or False: there is gravity between all objects.
A combination of all Forces acting on an object is known as? Net Force
What is the difference between mass and weight? Mass is made of matter and doesn’t change. Weight is the measure of gravity and changes.
A push or pull on an object is known as a ... Force
Wax, grease, and oil are known as _____________ and ____________ friction. Lubricants; reduce
If the mass increases, the acceleration will decrease. If the mass of an object increases, What happens to the acceleration of the object and why? If the mass increases, the acceleration will decrease.
When your water bottle is on your desk, why does it not move? The forces acting on it are balanced!
A moving object has what kind of energy? Kinetic energy!
A ball on the top of a hill has potential energy. A ball is placed on the top of a hill. What type of energy does it have? A ball on the top of a hill has potential energy.
Which Law is represented by this picture? Newton’s 1st Law
An object that stays in place and helps you detect the motion of another object Reference Point
If an object is moving and no force is acting on it If an object is moving and no force is acting on it. What will happen to the object? It would move forever!
The tendency of an object to resist change is called what? Inertia.
Which Law is represented by this picture? Newton’s 3rd Law
A force between two touching objects is called what? Friction
What causes objects to be attracted to the Earth? Gravity
The one with the least mass. All six groups had the same cars. If they were pushed along a flat surface with the same force, but with different masses, which would travel the farthest? The one with the least mass.
The pull of gravity is greatest between… Objects that have larger mass and objects that are close together.
The piece of paper because of air resistance. Sally drops a paper ball and an equal massed piece of paper. Which drops slower and why? The piece of paper because of air resistance.
Which Law is represented by this picture? Newton’s 2nd Law
Newton’s 1st Law; Inertia A vehicle slams on its brakes and the passengers are jerked by the seatbelts. Why? Newton’s 1st Law; Inertia
Speed and Direction acting on an object is also known as? Velocity
Which Law is represented by this picture? Newton’s 3rd Law