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A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal.
a) How many forces act on the crate? (identify them).
b) How much work does each force produce?
c) What is the total work done on the crate?
The wheel of a car has a radius of 20cm. It initially rotates at 120rpm. In the next minute it makes 90 revolutions. How much farther does the car travel before coming to rest
A violinist is trying to tune her instrument to 512 Hz, but it is at 491. By what percent does she have to change the tension to tune the violin? Answer A) 1.2% B) 4.1% D) 8.7% E) 12.1% F) 14.5%
The steel I-beam in the drawing has a weight of 8.39 × 103 N, What is the tension in each cable attached to its ends
It is possible for a muon to be captured by a proton to form a muonic atom. A muon is identical to an electron except for its mass, Calculate the magnitude of the lowest energy state
When a guitar string is sounded along with a 441-Hz tuning fork, a beat frequency of 4.00 Hz is heard. When the same string is sounded along with a 437-Hz tuning fork, beat frequency is 8.00 Hz. What is the frequency of the string.
A large boulder rests on a cliff 500 m above a small village in such a position that, What is the initial speed of the boulder
A potential difference of 14.0 V is applied across a wire of cross-sectional area 5.01 mm2 and length 745 km. What type of wire is this
A racecar accelerates uniformly while starting from rest, find the total linear acceleration of a point on the outside of the tire when the car has traveled a distance of 200 m
A projectile proton with a speed of v collides elastically with a target proton initially at rest. what is the speed of the projectile proton
Somewhere between the Earth and the moon, gravity from these two bodies on the space pod would cancel. Is this location nearer the Earth, the moon, or in the middle (having the same distance between) of the earth and the moon.
A Single Turn, Square Loop A 0.408 m length of wire is formed into a single-turn, square loop in which there is a current of 14.3 A. What is the maximum torque that the loop can experience
Two lenses, one converging with focal length 21.0cm and one diverging with focal length ? 10.0cm , are placed 25.0?cm apart. Find the final image distance from second lens
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