Force and laws of motion

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

• Skater 1 experiences a greater change in momentum

• Skater 1 has a greater velocity than Skater 2

• Skater 2 experiences a greater change in momentum

• Skater 1 experiences a greater force

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• Car

• Bike

• Both

• Cannot find

During a collision _______________ is always constant

• Force

• Motion

• Momentum

• Velocity

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.

• A 0.15 kg object rolling at 2 m/s.

• A 0.15 kg object rolling at 1 m/s

• A 0.4 kg object rolling at 2 m/s.

Newton's third law is about

• Force and Inertia

• Change in momentum

• Inertia at reactions

• action and reaction

If net force on an object is zero. it is considered to be

• at rest

• having balanced force

• having unbalanced force

• at motion

When two objects collide

• p1>p2

• p1<p2

• p1 = p2

• p1 * p2 = p1 + p2

When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?

• The cannon moving backward

• The cannon moving forward

• The cannonball moving forward

• The cannonball moving backward

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• same direction 100N

• same direction 200N

• opposite direction 100N

• opposite direction 200N

A person steps out of the boat and onto the dock. As the person moves forward onto the dock, the boat moves backward. Which statement best describes the backward motion of the boat as the person steps forward?

• A object is at rest or motion till an unbalance force acts on it

• Momentum before and after collision are same

• Force is product of mass and acceleration

• Every action has equal and opposite reaction