Understanding Laws of Motion

What does Newton's First Law state about motion?

• An object will accelerate if no force is applied.

• An object in motion will eventually stop without any force.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will change direction only if a force is applied.

How does Newton's Second Law relate force, mass, and acceleration?

• Force is equal to acceleration divided by mass (F = a/m).

• Mass is equal to force times acceleration (m = F * a).

• Acceleration is equal to force divided by mass (a = F/m).

• Force is equal to mass times acceleration (F = ma).

Can you give an example of Newton's Third Law in action?

• A person pushing a wall causes the wall to push back with equal force.

• A balloon inflating causes the air inside to compress.

• A car accelerating forward pushes the driver back into the seat.

• Jumping off a boat causes the boat to move in the opposite direction.

What is the formula for calculating momentum?

• p = mv^2

• p = m + v

• p = mv

• p = m/v

How does momentum change during a collision?

• Momentum is conserved in a collision, but individual momenta of colliding objects change.

• Momentum can be created or destroyed in a collision.

• Momentum is always lost during a collision.

• The total momentum of colliding objects always increases.

What is the principle of conservation of momentum?

• Momentum can be created or destroyed.

• In a closed system, momentum can change over time.

• In a closed system, total momentum remains constant.

• Total momentum is always equal to zero.

How does friction affect motion according to Newton's First Law?

• Friction only affects stationary objects and not those in motion.

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

• Friction enhances motion and speeds up a moving object.

• Friction opposes motion and can cause a moving object to slow down or stop.

What happens to an object's acceleration if the mass is doubled while the force remains constant?

• The acceleration becomes zero.

• The acceleration is doubled.

• The acceleration is halved.

• The acceleration remains the same.

In a perfectly elastic collision, what happens to the total momentum?

• The total momentum decreases.

• The total momentum remains constant.

• The total momentum increases.

• The total momentum becomes zero.

How do action and reaction forces relate to everyday activities?

• Everyday activities do not involve any forces at all.

• Action and reaction forces only apply to sports activities.

• Action and reaction forces are only relevant in physics experiments.

• Action and reaction forces are fundamental to understanding movement and interaction in daily activities.