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Going back to the previous problem, the box feels the normal force from the gro…

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Wize University Physics Textbook (Master) > Newton's Laws of Motion: Forces and Dynamics

Newton's Laws of Motion

5 Activities

Going back to the previous problem, the box feels the normal force from the ground and the force of gravity. Are FN and Fg an action-reaction pair?
More Newton's Laws of Motion Questions:
Practice: Three books on a table
Three books are sitting at rest on a table.
a) Draw a sketch.
b) Draw a complete free-body diagram for each book.
Example Problem: force of tension
Two blocks of mass m1=2Kgm_1 = 2Kg and m2=3Kgm_2 = 3Kg linked by a string through a pulley, where the block of mass m1 slides on the frictionless table. We assume that the string is massless and the pulley is massless and frictionless
a) Find the magnitude of the acceleration of the two masses b) Find the tension in the string
Tugboats (defining systems)
Practice: Tugboat
A tugboat of mass 13,300 kg has an engine that exerts a force of 112 kN forward while it pulls a much larger boat behind it. This system experiences 16.1 kN of forces resisting motion (think of this as the "friction" between the boat and the water, although there would be more than friction going on in this case).
a) If the acceleration of the system is 0.700 m/s2m/s^2, what is the mass of the larger boat?
One end of a uniform 4.0 m-long rod of weight w{\small w} is supported by a cable at an triangle of θ = 37°{\small \theta\ =\ 37\degree}with the rod. The other end rests against a wall, where it is held by friction, as shown. The coefficient of static friction between the wall end the rod is μs = 0.50.{\small \mu_s\ =\ 0.50.} Determine the minimum distance x{\small x} from point A at which an additional weight w{\small w} (the same as the weight of the rod) can be hung without causing the rod to slip at point A. Enter your answer in meters to the appropriate number of sig figs.
Tugboats (defining systems)
A tugboat of mass 13300 kg has an engine that exerts a force of 112 kN forward while it pulls a much larger boat behind it. This system experiences 16.1 kN of forces resisting motion (think of this as the "friction" between the boat and the water, although there would be more than friction going on in this case).
a) If the acceleration of the system is 0.700 m/s2m/s^2, what is the mass of the larger boat?
b) Calculate the force exerted by the tugboat on the larger boat, assuming that 14.7 kN of the resistive forces are experienced by the larger boat.
Practice: Three books on a table
Three books are sitting at rest on a table.
a) Draw a sketch.
b) Draw a complete free-body diagram for each book.
A 45 kg45\ kg man is standing in an elevator.
Draw a free body diagram of the system then determine whether the statements about the apparent weight of the man are true. Let upward be +y.
All of Newton's laws
Alice, who is 50kg, pushes against a box weighing 25kg. They are both on ice (frictionless), and there is no drag.
Tugboats (defining systems)
A tugboat of mass 13300 kg has an engine that exerts a force of 112 kN forward while it pulls a much larger boat behind it. This system experiences 16.1 kN of forces resisting motion (think of this as the "friction" between the boat and the water, although there would be more than friction going on in this case).
a) If the acceleration of the system is 0.700 m/s2m/s^2, what is the mass of the larger boat?
b) Calculate the force exerted by the tugboat on the larger boat, assuming that 14.7 kN of the resistive forces are experienced by the larger boat.
To calculate the change in momentum, you need to know the net force, the mass and the time that the force was applied for.
A small car with mass 0.800 kg travels at constant speed on the inside of track that is vertical circle with radius 5.00 m (Fig.). What is the normal force on the car when it is at the bottom of the track (point A)?
In the following figure, m2 is located on a frictionless surface. If the coefficient of static friction between m1 and m2 is μ\mu,
what is the minimum force required so that m1 and m2 remain stationery?
For a roller coaster loop with radius of 20m what is the minimum speed for the train to complete the loop without falling down?
What is the reaction force to force of gravity acting on the person?
What happens to the acceleration of an object when it's mass doubles? Assume force remains constant.ange
An object is resting on table.
True or False: The weight of an object and the normal force make an action-reaction pair.
Example Problem: force of tension
Two blocks of mass m1=2Kgm_1 = 2Kg and m2=3Kgm_2 = 3Kglinked by a string through a pulley, where the block of mass m1 slides on the frictionless table. We assume that the string is massless and the pulley is massless and frictionless
a) Find the magnitude of the acceleration of the two masses b) Find the tension in the string