Forces and Motion

What is a force?

• A push or pull that one object exerts on another object with or without direct contact

• A type of energy that can be converted into work

• A measure of the mass of an object

• A reaction that occurs when two objects collide

What is gravity?

• A force that pulls objects down to Earth

• A type of energy that moves objects

• A phenomenon that causes objects to float

• A measure of an object's mass

What does speed mean?

• The rate an object is moving, how fast it's going, how the position of an object changes during a certain amount of time

• The distance covered by an object in a straight line

• The time taken for an object to come to a stop

• The maximum velocity an object can achieve

What is acceleration?

• The change in velocity (speed or direction)

• The rate of change of distance

• The force applied to an object

• The speed of an object at a given moment

If an object is able to move, what type of force is happening?

• balanced forces

• unbalanced forces

• frictional forces

• gravitational forces

If an object isn't able to move, what type of force is happening?

• unbalanced forces

• frictional forces

• balanced forces

• gravitational forces

If someone is pushing an object but it doesn't move, why isn't it moving?

• There is not enough force being applied to move the object.

• Another opposing force is being applied and the forces are balanced (pushed against a wall, pushing against someone else)

• The object is too heavy to be moved by a single person.

• The surface is too slippery for the object to gain traction.

What is velocity?

• The speed of an object in a particular direction

• The distance traveled by an object in a given time

• The rate of change of position of an object

• The total path length traveled by an object

What are balanced forces?

• Forces that are equal in size but opposite in direction

• Forces that are unequal in size and direction

• Forces that act in the same direction

• Forces that have no effect on motion

What flooring would have the least amount of friction carpet or tile? Why?

• Carpet provides a rough surface that increases friction.

• Tile-gliding is much easier than on carpet, smoother surface.

• Carpet is designed to be soft and reduce slipping.

• Tile is more textured, which increases friction.