Exploring Forces and Motion

What are the four fundamental types of forces?

• Magnetic force

• Centrifugal force

• Frictional force

• Gravitational force, electromagnetic force, strong nuclear force, weak nuclear force.

How does friction affect the motion of an object?

• Friction opposes motion and can slow down or stop an object.

• Friction increases the speed of an object.

• Friction has no effect on the motion of an object.

• Friction only acts on objects in motion.

Define acceleration and provide its formula.

• a = (v_f + v_i) * t

• a = v_i / t

• The formula for acceleration is a = (v_f - v_i) / t, where a is acceleration, v_f is final velocity, v_i is initial velocity, and t is the time taken.

• a = v_f + v_i / t

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed is always greater than velocity.

• Velocity measures distance only, not direction.

• Speed can be negative, while velocity cannot.

Explain the law of conservation of momentum.

• Momentum can be created or destroyed in a system.

• In a closed system, the total momentum remains constant over time.

• The total momentum changes based on external forces.

• Momentum is only conserved in elastic collisions.

What happens to momentum during a perfectly elastic collision?

• Momentum is only partially conserved during a perfectly elastic collision.

• Momentum is conserved during a perfectly elastic collision.

• Momentum is lost during a perfectly elastic collision.

• Momentum is transformed into energy during a perfectly elastic collision.

How do you calculate the momentum of an object?

• momentum = velocity - mass

• momentum = mass × velocity

• momentum = mass / velocity

• momentum = mass + velocity

What factors influence the acceleration of an object?

• Net force and mass of the object.

• Temperature and humidity of the environment.

• Time of day and location of the object.

• Color and shape of the object.