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A sled at rest is suddenly pulled in three horizontal directions at the same time, but it does not move. Paul pulls to the northeast with a force of 32 lb. Johnny pulls at an angle of 37o south of due west with a force of 54 lb. Connie pulls with a force to be determined.
a) Express the boys two forces in terms of the usual unit vectors.
b) Determine the third force (from Connie), expressing it first in component form and then as a magnitude and direction. Neglect friction.
A 48 kg bear slides, from rest, 9.7 m down a lodgepole pine tree, moving with a speed of 5.8 m/s just before hitting the ground. find the average frictional force that acts on the sliding bear
a charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 13.0 cm giving
A student wants to use a meter stick as a pendulum. Find how short an oscillation period can he find with a meter stick in this way
A 12kg runaway grocery cart runs into a spring with spring constant 210 N/m and compresses it by 70 cm .What was the speed of the cart just before it hit the spring.
Two skaters with masses of 66kg and 51kg , respectively, stand 7.5m apart, each holding one end of a piece of rope. how far does each skater travel
Assume cart 1 has mass 387 gram and initial velocity +v10 = 8.21 meter per second, and cart 2 has mass 980 gram. Find what percentage of the original energy was lost in this collision
The graph shows how the force component Fcosalong the displacement varies with the magnitude s of thedisplacement. Find the work done by the force. (Hint: Recallhow the area of a triangle is related to the triangle's base andheight.)
In an experiment designed to measure the speed of light, a laser isaimed at a mirror that is 47.0 km due north. A detector is placed139 m due east of the laser. The mirror is to be aligned so that light from the laser refelects into the detector.
Place a friction block fuzzy side down on a track and add some mass on top to give it extra traction. Pull the block VERY SLOWLY with a spring scale, starting with very little effort but continuously increasing your effort over a few seconds until..
A double-slit experiment uses coherent light of wavelength 633nm with a slit separation of .100mm and a screen placed 2.0 m away. How wide on the screen is the central bright fringe
A 2000 kg car is slowed down uniformly from 21.0 m/s to 10.00 m/s in 3.60 s. (a) what average total force acted on the car all through that time? (b) How far did the car travel all through that time.
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, moves with velocity v in the negative x direction, what is the magnitude of the velocity of the third piece
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