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WorksheetsNewton's third law concepts
Total questions: 7
Worksheet time: 4mins
A soccer player kicks a ball with 1500 N of force. The ball exerts a reaction force against the player's foot of
Less than 1500 N
1500 N
More than 1500 N
None of the above
An apple falls from a tree. The reaction to this is
The Earth is pulled upward
Air resistance on the apple
The normal force from the ground
None of the above
When a cannon (大砲) is fired, the accelerations of the cannon and cannonball are different because
the forces don't occur at the same time
the force are not the same
the masses are different
the ratios of force to mass are the same
A bus hits a flying bug head-on. The force smushes the bug. Which is greater, the force on the bug or the force on the bus?
On the bug
On the bus
Both force are the same size
Cannot say
Two people of equal mass on slippery (滑) ice push off each other. Will both move at the same speed in opposite directions?
Yes
Yes, but only if both push equally
No
No, unless acceleration occurs
A bird flies by
Counteracting (抵消) the Earth's magnetic field (磁場)
Pushing air downward so that the air pushes it upward
Hovering (漂浮) in air
Breathing air in and out
The scientist pushes the cart but the cart pushes back with an equal force. How does the cart move?
The forces are balanced, so the cart does not move
Friction with the floor is an outside force that allows the system to move
The scientist's force is bigger than the cart's force
Air resistance pushes the cart forward
