Any force that resists motion

An object's tendency to stay at rest or keep moving; depends on mass.

An always-present force of attraction between all masses in the universe.

When all forces acting on an object are equal (net force is zero), so it does not cause a change in motion. It will continue in a straight line and a constant speed.

When all forces acting on an object are not equal; causes a change in motion. It will accelerate (speed up, slow down, change direction).

Speed and Direction

A change in speed, direction or both. (Speed up, slow down or change direction).

Speed = Distance divided by Time

The hurricane is moving Northwest at 20km/h

A change in velocity

An athlete ran 1,200 meters in six minutes

The space station orbits around Earth about 17,150 miles per hour

The sailboat is moving north at 10km/h.

The runner maintains his speed while going around a curve.

Matthew and Jonah (equal mass) are playing tug-o-war.

Mrs. Asaff is playing tug-o-war against Colby, Carson, Olivia and Riley. (Mrs. Asaff will still win!)

Mrs. Asaff swerves her car to avoid hitting Katie standing in the road. (You're welcome, Katie, and get out of the road!)

Yoseph is sleeping, so he is not moving. Wake up!

Valeria walks in a straight line at a constant speed to get to class.

T get Ja'Lah to stop talking, Mrs. Asaff throws a foam ball at her. It hits her head and bounces off in the opposite direction.

For every action, there is an equal but opposite reaction.

An object acted upon by an unbalanced force will accelerate in the direction of the force.

An object will remain at rest or move in a straight line with constant speed unless acted upon by an unbalanced force.

A ball rolling across the floor eventually comes to a stop.

Bianca jumps off a raft in the swimming pool, and when she turns around to get back on the raft, the raft has floated off in the opposite direction.

F = ma.

Forces always act in equal but opposite pairs.

As Amber and Jinda row their boat, they push the oars against the water. The boat moves forward after the water pushes against the oars.

The Law of Inertia.

Damian, the magician, pulls the tablecloth off a table, leaving the dishes on the table.

Tony is playing with a slingshot. He realizes a rock moves slower than a pebble shot out of the same slingshot.

Katilyn shoots a basket, and the ball accelerates toward the goal.

Speed= Distance/ Time

Force= Mass x Acceleration

Work = Force x Distance

Calculate the speed for a car that went a distance of 125 kilometers in 2 hours time.

A baseball is thrown a distance of 20 meters. What is its speed if it takes 0.5 seconds to cover the distance?

How much time does it take for a bird flying at a speed of 45 kilometers per hour to travel a distance of 1,800 kilometers?

Saane is cruising through the school at a speed of 20 kilometers per hour for 4 hours time. What is the total distance traveled by the Saane during this time?

What net force is required to accelerate a car at a rate of 2 m/s² if the car has a mass of 3,000 kg?

A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s²?

What is the mass of a falling rock if it produces a force of 14 N?

What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's glove with a force of 25 N?

Aaliyah uses 20N of force to push a lawn mower 10 meters. How much work does she do?

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 50N?

The energy that something has because of its position or the way its parts are arranged (stored energy).

Energy associated with motion.

Which locations would the roller coaster have potential energy?

Which locations would the roller coaster have kinetic energy?

Which location would the roller coaster have the greatest amount of potential energy?

Which location would the roller coaster have the greatest kinetic energy?

The purpose of a nuclear power plant is to transform nuclear energy into electricity. This is done in steps starting with a nuclear reaction which generates heat to produce steam. The steam in turn is used to turn a generator which finally produces electricity. Which answer best illustrates these energy transformation?

What energy transformations takes place when you strike and light a match?

PHOTOSYNTHESIS transforms electromagnetic energy from the Sun into

Answering your cell phone transforms the chemical energy in its battery into...

Which of the pictures below illustrates the transformation of electrical to thermal energy?