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.An equal and opposite reaction

C.A smaller reaction

D.No reaction

Question 2mcq

When you push a wall, the wall:

A.Pushes you back with equal force

B.Does not exert force

C.Removes your mass

D.Pulls earth only

Question 3mcq

Action and reaction forces act on:

A.Only fluids

B.The same body only

C.No body

D.Different bodies

Question 4mcq

A gun recoils backward because the bullet is pushed:

A.Nowhere

B.Sideways by gravity

C.Forward by the gun

D.Backward by air

Question 5mcq

A swimmer moves forward by pushing water:

A.Upward only

B.Backward

C.Nowhere

D.Forward

Question 6mcq

Why do action-reaction forces not cancel each other?

A.They act on different objects

B.They are unequal

C.They act at different times always

D.They are not forces

Section B: Applying All Three Laws

Question 7mcq

A football remains at rest until kicked. This shows:

A.Third law only

B.Law of conservation of energy

C.Ohm’s law

D.Newton’s first law

Question 8mcq

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

A.First law only

B.No law

C.Newton’s second law

D.Third law only

Question 9mcq

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

A.Only inertia

B.Newton’s third law

C.Only frictionless motion

D.Only balanced force

Question 10mcq

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

A.Force on acceleration

B.Colour on speed

C.Shape on mass

D.Time on length

Question 11mcq

In a force experiment, the independent variable is usually:

A.The constant result

B.The safety goggles

C.The final conclusion

D.The variable deliberately changed

Question 12mcq

A fair test comparing masses should keep the applied force:

A.Always zero

B.Random

C.Same

D.Unknown