Dynamics
If one object exerts a force on a second object, the second object always exerts a force of ___ magnitude on the first object in the opposite direction.
tripled
doubled
halved
equal
In terms of action-reaction pairs identified by Newton's Third Law, what happens when you jump off a boat onto land?
Land pushes against your feet; boat remains unaffected by jump.
Your feet exert downward backward forces on boat; boat exerts upward forward reactions on your feet.
You only exert downward gravitational pull; no horizontal interaction occurs between you, boat.
Boat propels forward independently upon your landing.
When drawing a free-body diagram for an object resting on a horizontal surface, which type of force would you not include?
Normal force reacting to the weight of the object
Applied horizontal forces if present
Gravitational force downward due to earth gravity
Frictional force resisting motion along the surface
You are pushing an 10 kg object across a frictionless floor with 300 N of force. What is the force the box exerts on you?
300 N
196 N
250 N
98 N
Two astronauts on a given space mission have identical masses. If one pushes the other away with a certain force, what happens due to Newton's third law?
The other astronaut experiences a force twice as much as the pusher due to their shared momentum.
The astronaut doing the pushing experiences an equal but opposite reaction force, thus moving in the opposite direction.
Both astronauts experience no change in motion due to equal forces between them.
One astronaut experiences more force since they are actively involved in the interaction.
Two identical rockets are fired in deep space. One rocket expels twice the amount of fuel compared to the other. What effect does this have on the relative velocities of the rockets after fuel burnout?
Less fuel results in a slower overall speed.
Their relative velocities are the same despite the difference in quantities expelled.
Neither rocket changes velocity since they're similar payloads.
The rocket expelling double the amount of fuel achieves a higher final velocity.
If two skaters push off each other on ice, how do their accelerations compare?
One skater will always accelerate more than the other regardless of mass.
They won't accelerate because they cancel each other out completely.
They have equal magnitudes but in opposite directions if their masses are equal.
Both skaters will accelerate in the same direction with different magnitudes based on mass.

How are we doing?
Give us your feedback and let us know how we can improve
How does increasing the gravitational field strength where two masses exert forces on each other via a pulley system alter the tension in a rope connecting them if all other factors remain unchanged?
Tension in the rope remains constant regardless of changes in gravitational field strength.
Tension in the rope initially increases but then reaches a maximum value as gravitational field strength continues to increase.
Tension in the rope decreases proportionally with gravitational field strength.
Tension in the rope increases proportionally with gravitational field strength.
A student punches his open left hand with his right hand. Which statement is true about the forces his two hands exert on each other?
Their right hand and left hand exert equal and opposite forces on each other
Their right hand puts more force on the left because it is punching.
Their left hand puts more force on the right because it is reciprocating the punch.
No conclusion can be made.
In space, astronaut A pushes astronaut B away; how does astronaut A's acceleration compare to astronaut B’s if they have different masses?
Astronaut A will accelerate at a rate inversely proportional to his/her own mass compared to astronaut B’s acceleration.
Astronaut B will accelerate faster due to lack of friction in space affecting both equally.
Astronaut A will accelerate at the same rate as astronaut B regardless of their masses.
Astronaut A will not accelerate since he/she is doing the pushing.