8100

Physics Force & Laws Of Motion Level: Misc Level

A short 10 gram string is used to pull a 50 gram toy across a frictionless horizontal surface. If a 3.0 x10 Newton force is applied horizontally to the free end.Find the force of the string on the toy,at the other end.


8099

Physics Force & Laws Of Motion Level: Misc Level

A rocket exhausts fuel with a velocityy of 1500 m/s, relative to the rocket.It starts rest in outer space with feul comprising 80% of the totoal mass.Find its speed in all the fuel has been exhausted.


8097

Physics Force & Laws Of Motion Level: Misc Level

A stone of m=0.8 kg is projected across a sheet of ice with an initial speed of 2.40 m^-1.The coefficient of sliding friction between the stone and the ice is 0.0250.How far will the stone travel before it comes to rest?Take g=9.81 ms^-2.


8095

Physics Force & Laws Of Motion Level: Misc Level

Two masses are suspended from a frictionless pulley as shown. The pulley itself has a mass of 10-kg and its radius r=10 cm.(a) What is the magnitude of the acceleration of the suspended masses if m1=12 kg,and m2=8 kg? (b) What are the tensions in the string? (Neglect the mass of the string.)


8094

Physics Force & Laws Of Motion Level: Misc Level

A child whose weight is 287 N slides down a 6.6 m playground slide that makes an angle of 41% with the horizontal.The coefficient of kinetic friction between slide and child is 0.086.(a) How much energy is transferred to thermal energy? (b) If she starts at the top with a speed of 0.568 m/s, what is her speed at the bottom?


8092

Physics Force & Laws Of Motion Level: Misc Level

A child whose weight is 287 N slides down a 6.6 m playground slide that makes an angle of 41% with the horizontal.The coefficient of kinetic friction between slide and child is 0.086.(a) How much energy is transferred to thermal energy? (b)If she starts at the top with a speed of 0.568 m/s, what is her speed at the bottom?


8091

Physics Force & Laws Of Motion Level: Misc Level

In Fig.8-50, a block slides along a track from one level to a higher level after passing through an intermediate valley.The track is frictionless until the block reaches the higher level.There a frictional force stops the block in a distance d.The block,s initial speed v0 is 7.6 m/s;the height difference h is I m;and the coefficent of kinetic friction uk is 0.51. Find d.


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?


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