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Q. A 3-m-long rigid beam with a mass 120 {rm kg} is supported at each end. An 70 {rm kg} student stands 2.0 {rm m} from support 1. How much upward force does support 1 exert on the beam?
Q. Eight books, each 9.0 cm thick with mass 1kg, lie flat on a table. How much work is required to stack them one on top of another?
A rectangular container measuring 10cmx20cmx25cm is filled with gas. What is the mass volume of water in kilograms.
For a spherical celestial object of radius R, acceleration due to gravity g at a distance x from the center of the object is g = g0R2/x2, where g0 is the acceleration due to gravity at the object's surface and x > R.
Problem on the velocity of boat
find out the speed of the test charge. How many electrons should be removed from A and put onto B to make the electrostatic force that acts on each object an attractive force whose magnitude is 23.6 N.
find the arrow's initial speed? How long did it take for the arrow to first reach a height of 17.5 m above its launch point.
A gun is fired vertically into a 2.00 kg block of wood at rest straight above it. If the bullet has a mass of 21.0 g and a speed of 198 m/s, how high would the block rise into the air after the bullet becomes embedded in it.
how long does it take the engine to lift the crate a vertical distance of 19.8 m? Friction in the system is negligible.
A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 415 N walk on the overhanging part of the plank before it just ..
A 0.150 kg ball is going around in a vertical circle of radius R = 0.300 m at constant speed v. The ball is attached to a mass less ideal string which is attached to a fixed pivot point. If the tension F in the string is greater than 125 N, the st..
A sledge with bricks has a total mass of 180.0 kg and is pulled at a constant speed by a rope inclined at 20 degrees above the horizontal. The sledge moves a distance of 20 m on a horizontal surface.
A 3.1 kg dog stands on a 15.00 kg flatboat at distance D = 6.1 m from the shore. It walks 2.00 m along the boat toward shore and then stops. Assume no friction between the boat and the water, find how far the dog is then from the shore.
What is the speed of the block while the spring is till now compressed by xf=0.14m.
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