8031

Physics Force & Laws Of Motion Level: Misc Level

A block of wood is sliding down a plane which is inclined 50.0. with respect to the ground. The coefficient of kinetic friction between the block of wood and the inclined plane is 0.125.Find the acceleration of the block.


8030

Physics Force & Laws Of Motion Level: Misc Level

The ball in the figure (below) is supported by the two (massless) cables.You are told that the weight of the ball is 175 N.What are the tensions in cable 1 and cable 2?With the information given to you,do the tensions depend on whether or not this problem is being solved on Earth or Zarkon? Assuming that this situation is on Zarkon,what is the mass of the ball?


7633

Physics Force & Laws Of Motion Level: Misc Level

A block of wood is sliding down a plane which is inclined 50.0 with respect to the ground. The coefficient of kinetic friction between the block of wood and the inclined plane is 0.125.Find the acceleration of the block.


7632

Physics Force & Laws Of Motion Level: Misc Level

The ball in the figure (below) is supported by the two (masslessi) cables. You are told that the weight of the ball is 175 N. What are the tensions in cable 1 and cable 2? With the information given to you, do the tensions depend on whether or not this problem is being solved on Earth or Zarkon ?Assuming that this situation is on Zarkon, what is the mass of the ball?


7621

Physics Force & Laws Of Motion Level: Misc Level

A stream of water strikes a stationary trbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of +18.0 m/s, while the exiting water stream has a velocity of -18.0 m/s.The mass of water per second that strikes the blade is 18.0 kg/s.Find the magnitude of the average force exerted on the water by the blade.


7618

Physics Force & Laws Of Motion Level: Misc Level

A man weighing 220 pounds stands on a scale in an elevator. when the elevator is stand still the scale shows 220.5 pounds.when the elevator starts the scale shows 240.5. which way is the elevator going, up ordown?what is the acceleration?


7616

Physics Force & Laws Of Motion Level: Misc Level

Scientists are experimenting with a kind of gun that may  eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 5.0 kg projectile from rest to a speed of 4.5 x103 m/s.The net force accelerating the projectile is 5.5 x105N. How much time is required for the projectile to come up to speed?


7615

Physics Force & Laws Of Motion Level: Misc Level

A 1720 kg car is traveling with a speed of 15.0 m/s.What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 56.0 m?


7613

Physics Force & Laws Of Motion Level: Misc Level

A rock of mass 30 kg accidentally breaks loose from the edge of a cliff and falls straight down . The magnitude of the air resistance that opposes its downward motion is 270 N.What is the magnitude of the acceleration of the rock?


7611

Physics Force & Laws Of Motion Level: Misc Level

Airplane flight recorders must be able to survive catastrophic crashes.Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. one of the tests is an impact shock test, in which the box must survive being thrown at high speeds against a barrier.A 41 kg box is thrown at a speed of 245 m/s and is brought to a halt in a collision that lasts for a time of 5.2 ms. What is the magnitude of the average net force that acts on the box during coliion?


7610

Physics Force & Laws Of Motion Level: Misc Level

 A 410-kg sailboat has an acceleration of 0.43 m/s2 at an angle of 31% north of east. Find the magnitude and direction of the net force that acts on the sailboat.


7609

Physics Force & Laws Of Motion Level: Misc Level

Two forces, F1 and F2, act on the 5.00 kg block shown in the drawing. The magnitudes of the force are F1=50.0 N and F2=31.0 N. What is the horizontal acceleration (magnitude and direction) of the block?


7520

Physics Force & Laws Of Motion Level: Misc Level

A 12.1 kg concrete block rests on a horizontal table. The coefficient of kinetic friction between the block and the table is .37.A second block is attached to the concrete block by a string a string passing over a frictionless pulley of negligible mass. If the acceleration of the concrete block is .735 m/s2 to the right, what is the mass of the second block?


7517

Physics Force & Laws Of Motion Level: Misc Level

A student has a 75 g crystal hanging by a string of negligible mass from the rearview mirror in her car.

a.Determine the angle the string makes with the vertical when she accelerates at a constant rate of .35 g ( maybe this is a typo and should be.35 m/s??)

b.Determine the tension in the string during this acceleration.

c. Construct a free body diagram of the crystal


7515

Physics Force & Laws Of Motion Level: Misc Level

A 12.1 gram bullet is fired horizontally into a 24.0 cm thick wooden fence post at a point 155 cm above the ground with a speed of 430 m/s. The bullet then exits the post striking the ground 3509 cm from the base of the post.Determine the average resisting force exerted by the post on the bullet.


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