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Q. one end of a uniform beam of 222N is hinged to a wall, the other end is supported by a wire that makes angles of 30 with both wall and beam, find the tension in the wire and horizontal and vertical componentes of the force od the hinge on the beam.
Q. On a very muddy football field, a 120 linebacker tackles an 85 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.7 north and the halfback is sliding with a velocity of 7.4 east. What is the direction and angle of the velocity after the collision.
A chocolate bar (40grams) has 210 Calories. Approximately how long would the 100 watt light bulb shine if we convert all the chocolate's energy into electricity (100% efficiently)? (Remember 1Cal = 1000 cal = 4200 joules)
How numerous years would it take a thermally insulated one-million-kilogram chuck of granite to undergo a 1000k boost in temperature?
A plane flies from base camp to Lake A, 280 km away in the direction 20° north of east. After dropping off supplies it flies to Lake B that is 190 km at 30° west of north from Lake A. Graphically find out the distance and direction from Lake B to ..
The two forces in each pair could have different physical origins (for instance, one of the forces could be due to gravity, and its pair force might be due to friction or electric charge).
A man drags a 72.0 kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 26 degrees above the horizontal, and the strap is inclined 68 degrees above the horizontal. The center ..
A real object is placed at the zero end of a meterstick. A large concave mirror at the 100 cm end of the meterstick forms an image of the object at the 70.0cm position. A small convex mirror placed at the 20 cm position forms a final image at the ..
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer .
Hair dryer draws a current of 9.2a. How long does it take 1.9*10^3 C of charge pass through? How many electrons does this represent.
A staging that weighs 440 N supports two painters, one 110 N and the other 460 N. The reading in the left scale is Ft = 800 N. What is the reading Fr, in the right hand scale.
A certain freely falling object requires 1.56 s to travel the last 37.0 m before it hits the ground. From what height above the ground did it fall.
The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet
Two charges, q1 and q2, are separated by a distance, r, and exert a force, F, on each other. What will the new force be if:
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