Homework Practice

Printable assignment

Action-Reaction Lab: Newton’s Third Law in Real Life

Section A: Newton’s Third Law

Question 1mcq

Newton’s third law states that every action has:

A.A delayed reaction only

B.No reaction

C.A smaller reaction

D.An equal and opposite reaction

Question 2mcq

When you push a wall, the wall:

A.Removes your mass

B.Pushes you back with equal force

C.Does not exert force

D.Pulls earth only

Question 3mcq

Action and reaction forces act on:

A.No body

B.The same body only

C.Different bodies

D.Only fluids

Question 4mcq

A gun recoils backward because the bullet is pushed:

A.Backward by air

B.Nowhere

C.Sideways by gravity

D.Forward by the gun

Question 5mcq

A swimmer moves forward by pushing water:

A.Backward

B.Nowhere

C.Forward

D.Upward only

Question 6mcq

Why do action-reaction forces not cancel each other?

A.They are unequal

B.They act on different objects

C.They are not forces

D.They act at different times always

Section B: Applying All Three Laws

Question 7mcq

A football remains at rest until kicked. This shows:

A.Newton’s first law

B.Ohm’s law

C.Law of conservation of energy

D.Third law only

Question 8mcq

A loaded cart accelerates less than an empty cart for same push. This shows:

A.Newton’s second law

B.First law only

C.Third law only

D.No law

Question 9mcq

Walking forward is possible because foot pushes ground backward and ground pushes foot forward. This shows:

A.Only balanced force

B.Newton’s third law

C.Only frictionless motion

D.Only inertia

Question 10mcq

A model car experiment changing push force should keep mass constant to test effect of:

A.Colour on speed

B.Shape on mass

C.Time on length

D.Force on acceleration

Question 11mcq

In a force experiment, the independent variable is usually:

A.The variable deliberately changed

B.The final conclusion

C.The constant result

D.The safety goggles

Question 12mcq

A fair test comparing masses should keep the applied force:

A.Unknown

B.Same

C.Random

D.Always zero