Now you know how to identify action-reaction pairs and use your understanding of Newton's Second and Third Laws to solve problems. Use what you know to answer these multiple choice questions.
A jumbo jet cruises at a constant velocity when the total thrust of the engines on the jet is 30,000 N. How much air resistance acts on the jet?
- 30,000 N in the same direction as the jet
- 30,000 N in the opposite direction of the jet
- 9.81 N in the same direction as the jet
- 67,890 N in the opposite direction of the jet
To move at a constant velocity, the net force on the jet must be equal to zero.
To move at a constant velocity, the net force on the jet must be equal to zero.
To move at a constant velocity, the net force on the jet must be equal to zero.
To move at a constant velocity, the net force on the jet must be equal to zero.
If you push on a wall with 45 N, how much force does the wall apply back to you?
- 45 N
- 75 N
- 54 N
- 34 N
This is an action-reaction pair.
This is an action-reaction pair.
This is an action-reaction pair.
This is an action-reaction pair.
A car hits a brick wall head-on. The amount of force that the wall pushes back on the car is...
- greater than the force the car puts on the wall.
- less than the force the car puts on the wall.
- the same as the force the car puts on the wall.
This is an action-reaction pair.
This is an action-reaction pair.
This is an action-reaction pair.
A 3.80 kg rifle accelerates a 4.20 x 10-3 kg bullet from rest to 862 m/s in 1.94 x 10-3 s. What is the acceleration of the rifle?
- 862 m/s2
- 4.44 x 105 m/s2
- -4.90 x 102 m/s2
- Not enough information to solve.
First, find the bullet's acceleration and use that in F = ma calculation to find the force applied. Use the opposite of that force in the F = ma equation again to find the acceleration of the rifle.
First, find the bullet's acceleration and use that in F = ma calculation to find the force applied. Use the opposite of that force in the F = ma equation again to find the acceleration of the rifle.
First, find the bullet's acceleration and use that in F = ma calculation to find the force applied. Use the opposite of that force in the F = ma equation again to find the acceleration of the rifle.
First, find the bullet's acceleration and use that in F = ma calculation to find the force applied. Use the opposite of that force in the F = ma equation again to find the acceleration of the rifle.
Summary
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