AP Physics 1 review

What is the principle of conservation of momentum?

• The principle states that in a closed system, the total momentum before an event is equal to the total momentum after the event.

• Momentum is always conserved in open systems regardless of external forces.

• The total momentum of a system can change if external forces are applied.

• Momentum is only conserved in elastic collisions.

What is the relationship between velocity and time for an object in free fall?

• The velocity decreases linearly with time.

• The velocity remains constant over time.

• The velocity increases linearly with time, represented by the equation v = gt.

• The velocity increases exponentially with time.

What is potential energy?

• The energy stored in an object due to its position or configuration, commonly represented as PE = mgh.

• The energy an object possesses due to its motion.

• The energy released during a chemical reaction.

• The energy required to change the temperature of an object.

What does a horizontal line on a velocity vs. time graph indicate?

• The object is accelerating.

• The object is at rest.

• The object is moving at a constant velocity.

• The object is moving in the opposite direction.

What is a collision in physics?

• A collision is an event where two or more bodies exert forces on each other for a relatively short time, resulting in a change in momentum.

• A collision is when two objects move in parallel without interacting.

• A collision occurs when two bodies come to a complete stop after contact.

• A collision is a type of energy transfer between two objects.

What is the difference between speed and velocity?

• Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

• Speed and velocity are the same; both refer to how fast an object is moving.

• Velocity is a scalar quantity that refers to how fast an object is moving, while speed is a vector quantity that includes both speed and direction.

• Speed is a measure of distance traveled over time, while velocity is a measure of time taken to travel a distance.

How do you calculate the momentum of an object?

• Momentum (p) is calculated using the formula p = mv, where m is the mass of the object and v is its velocity.

• Momentum (p) is calculated using the formula p = m + v, where m is the mass of the object and v is its velocity.

• Momentum (p) is calculated using the formula p = m/v, where m is the mass of the object and v is its velocity.

• Momentum (p) is calculated using the formula p = mv^2, where m is the mass of the object and v is its velocity.

What is acceleration?

• Acceleration is the rate of change of velocity of an object, calculated as a = (v_f - v_i) / t.

• Acceleration is the speed of an object in a given direction.

• Acceleration is the distance traveled by an object over time.

• Acceleration is the force applied to an object divided by its mass.

How do you calculate the acceleration of an object in circular motion?

• a = v / r

• a = v^2 / r

• a = r / v

• a = v^2 * r

What happens to potential energy when an object is lifted?

• It decreases due to loss of height.

• It remains constant regardless of height.

• It increases due to the increase in height.

• It becomes kinetic energy immediately.