6671

Physics Force & Laws Of Motion Level: Misc Level

Consider a flat surface with a coefficient of friction of .20 with a 2.0 kg mass And a 3.0 kg mass connected together with a 6.0 kg mass along a slant as shown below. The coefficient of friction on the slant is zero. Calculate the acceleration of the system.


6657

Physics Force & Laws Of Motion Level: Misc Level

The distance between two telephone poles is 50 m. When a 1.00Kg bird lands on the telephone wire midway between the poles, the wire sags 0.200 m. Draw a free body diagram of the bird. How much tension does the bird produce in the wire? (Ignore the weight of the wire)

 


6509

Physics Force & Laws Of Motion Level: Misc Level

A 46.0 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact in the following cases? If the dancer is leaping upwards with an acceleration of 4.00 m/s2.---Pa


6507

Physics Force & Laws Of Motion Level: Misc Level

If the shear stress in steel exceeds about 3.70 108 N/m2, the steel ruptures.Determine the shearing force necessary to punch a 1.00 cm diameter hole in a steel plate 0.450 cm thick.-----N


6492

Physics Force & Laws Of Motion Level: Misc Level

Suppose that a girl weighing 125 pounds is wearing spike" heel shoes. If the surface of the heel in contact with the floor corresponds to a square measuring 1/4 on each side, and if she stands momentarily with all her weight on one heel, what is the pressure she exerts on the floor?

a.125 Ibs/in2

b. 500 Ibs/in2

c. 1000 Ibs/in2

d.1250 Ibs/in2

e. 2000 Ibs /in2


6490

Physics Force & Laws Of Motion Level: Misc Level

When a force is applied to a certain rod, there is a 1 cm change in length. If that same force is applied to a rod that is three times bigger in each dimension, what will be the change in length?

a. 9 cm

b. 3 cm 

c.1 cm 

d.0.33 cm 

e.0667 cm


6356

Physics Force & Laws Of Motion Level: Misc Level

If you blow up a balloon, and then release it,  theballoon will fly away as air rushes out. This is an illustration of-Galleo,s law of inertia, Newton,s 2 nd law, 1 or,st law or third law.


6348

Physics Force & Laws Of Motion Level: Misc Level

The force that a squirrel exerts on a nut it has found is observed over a 10 second interval, as shown in the graph. What is the average power exerted by the squirrel?


6345

Physics Force & Laws Of Motion Level: Misc Level

The kinetic friction of one metal object sliding along another metal surface depends least upon:The nature of the materials in contact, the coefficient of kinetic friction, the area of contact,the normal force.


6344

Physics Force & Laws Of Motion Level: Misc Level

A 10 kg mass,hung onto a spring, causes the spring to stretch 2 cm, the springs constant is.


6343

Physics Force & Laws Of Motion Level: Misc Level

To push a piece of heavy furniture across the carpet usually takes more force to get it moving than it takes to keep it moving. This is because:Of Newton,s 3rd law, the static coefficent of friction is larger than the kinetic coefficient,it does not take more force, or the kinetic coefficient of friction is larger than the static coefficient.


6342

Physics Force & Laws Of Motion Level: Misc Level

A wooden block slides directly down and inclined plane, at a constant velocity of 6 m/s. How large is the coefficient of kinetic friction, if the plane makes an angle of 25 degrees with the horizontal?


6341

Physics Force & Laws Of Motion Level: Misc Level

Consider a plot of the displacement on the y axis vs. applied force on the x axis for an ideal elastic spring. The slope of the curve would be:The reciprocal of the spring constant, the spring constant, the acceleration of gravity, the reciprocal of the acceleration of gravity.


6338

Physics Force & Laws Of Motion Level: Misc Level

A Packing car slides down an inclined plane at a constant velocity. Thus We Can deduce that:A net downward force is action on it, it is not acted on appreciable gravitational force, it may be accelerating,a frictional force is acting on it.


6297

Physics Force & Laws Of Motion Level: Misc Level

A 200 g ball hits a wall perpendicularly witha velocity of 30 m/s and rebounds with a velocity of 20 m/s.If the collision lasts for 5 milliseconds, find the average force exerted by the ball on the wall.

a.1000 N

b.4000N

c.6000 N

d.2000 N


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