3.6B STAAR Review

Front

What is work in physics?

Back

Work is done when a force is applied to an object and the object moves in the direction of the force. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

What happens to a magnet when it is brought close to another magnet?

Back

Depending on the orientation of the magnets, they can either attract or repel each other. Like poles repel, while opposite poles attract.

Front

What is the role of a pulley in lifting objects?

Back

A pulley changes the direction of the force applied, making it easier to lift heavy objects by pulling down on the rope.

Front

How does a force affect the motion of an object?

Back

A force can change the speed or direction of an object's motion. If a force is applied in the direction of motion, it increases speed; if applied against it, it decreases speed.

Front

What is the principle of inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the effect of friction on moving objects?

Back

Friction is a force that opposes the motion of an object. It can slow down or stop moving objects, depending on the surfaces in contact.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law of motion, the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state. For example, gravitational potential energy depends on an object's height above the ground.

Front

How does a student demonstrate work when pushing an object?

Back

A student demonstrates work by applying a force to the object and causing it to move in the direction of the force.