Duplicate of Newton's Laws of Motion

The acceleration of an object is inversely proportional to the net force acting on it.

Forces always occur 

When one object exerts force on 2nd object, 2nd object exerts = force back on 1st object. 

After a cannon ball is fired into frictionless space the # of force needed to keep it going = 

 A rocketship is pushed forward by gases that are forced out the back of the ship.

The acceleration produced by a net force on an object is 

A 10-N force and a 30-N force act on an object in opposite directions. What is the netforce?

If a hockey puck slides on a frictionless surface, it will  slow down because of its inertia. 

 As a 500 N woman sits on the floor, the floorexerts a force on her of 

A tennis ball & steel ball same size, dropped same time. In vacuum, which has > acceleration?

A 60-kg boy on skates pushes a wall w/ 30 N of force & recoils.What is his acceleration?

Objects move only when a force is exerted.

A woman weighing 500 N sits on the floor. She exerts a force on the floor of

Inertia is the reluctance any material object has to change in its state of motion. 

Pressure is defined as the force one object exerts on another object.

A high school student hits a nail with a hammer. During the collision, there is a force

The law of inertia states that an object 

A tennisball and steel ball same size r dropped same time. Which has greater force acting? 

Speed of object dropped in air will increase without limit until itstrikes theground.

Which has more mass, a kilogram of feathers or a kilogram of iron? 

A 50-kg block of cement is pulled upward with a force of 600 N. What is its acceleration?

The law of inertia applies to 

You push with 30 N on a 3-kg block with no opposing forces.What is the block’s acceleration?

Falling from a high-flying stationary helicopter, BJ’s velocity increases & his acceleration 

 If the force acting on a cart doubles, what happens to the cart’s acceleration? 

The combination of all the forces that act on an object is called the net force.

1.The amount of matter in an object is called its weight. 

On Jupiter gravity is about 3X that on Earth. How much would a 100 kg rock weigh on Jupiter?

The earth and moon pull on each other with equal amounts of force.

Air resistance is caused by friction between the air and an object moving through the air.