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problems with solutions

Topic:Force & Laws of Motion

I.D	Level	Problem	Problem Topic
23	High school	A girl and her bicycle have a total mass of 40.0 kg. At the top of a hill her speed is 5.00 m/s the hill is 10.0 m high vertically and 100.0 m along the incline use work energy methods A) Take friction to be acting . If her speed was 10.0 m/s as she arrives at the bottom of the hill , how much mechanical energy is lost to friction? Note girl doesn . . . continues Click to Purchase Solution	Force & Laws of Motion
24	High school	Blocks A and B are moving towards each other along the X axis. A has a mass of 4.00 kg and a velocity of 30.0 m/s ( in the positive X direction), While B has a mass of 2.00 kg and a velocity of -25.0 m/s (in the negative direction). A) Assume they sugffer an elastic head-on collision and move off along the . . . continues Click to Purchase Solution	Force & Laws of Motion
26	High school	A stone of m = 0.8 kg is projected across a sheet of ice with an initial speed of 2.40m s^-1 . The coefficient of sliding friction between the stone and the ice is 0.0250 . How far will the stone travel before it come to rest ? Take g = 9.81m s^-2 . . . . continues Click to Purchase Solution	Force & Laws of Motion
29	High school	A box of mass 8.3 kg placed on a smooth horizontal table is acted on by two horizontal forces . The first of magnitude 0.3 Newton's acts due East , and the second of magnitude 0.3 Newton's acts due North . Find the velocity of the box after 14.9 seconds . . . . continues Click to Purchase Solution	Force & Laws of Motion
40	High school	Two blocks are connected by a cable via a pulley which are massless and frictionless. Given the following: m=300.0 kg, m2= 100.0 kg, theta = 40.0 degree, micro = 0.350, determine: a. The direction of acceleration (mathematically no guesses) b. The value of acceleration c. . . . continues Click to Purchase Solution	Force & Laws of Motion
41	High school	Two masses are suspended from a frictionless pulley as shown in "click here " The pulley itself if has a mass of 10.kg and its radius r = 10 cm. (a) what is the magnitude of the acceleration of the suspended masses is m1 = 8 kg (b) what are the tension in the strings? (Neglect the mass of the string.) . . . continues Click to Purchase Solution	Force & Laws of Motion
42	High school	A 15.0 kg uniform board 2.4 m long is pivoted so that it can rotate at a horizontal axis through the end (point A). If a 100-kg mass and is suspended 1.80 m from the pivoted end, what is the tension in the string ? . . . continues Click to Purchase Solution	Force & Laws of Motion
47	High school	A certain horse says, "There is no use trying to pull that cart. No matter how hard I pull on cart, -it will always pull back on me with exactly the same force. So I can never make it go , " Explain what is wrong with the horse's reasoning. (Free-body diagrams ,showing all the forces involved , will help ) . . . continues Click to Purchase Solution	Force & Laws of Motion
48	High school	A bicycle and rider together weigh 186 lbs . when moving at 10 mi/hr on a level road, the rider ceases to pedal and observes that she comes to a stop after traveling 200 yds. a) How much work was done by the frictional force ? b) What was the average frictional force resisting her motion ? . . . continues Click to Purchase Solution	Force & Laws of Motion
49	High school	A 15 gram bullet is fired into a 10 kg wounded box which is mounted on small, frictionless wheels. Before the shot, the block is at rest. After the bullet hits the block, the combination of the two masses travels 45 cm in 1 second. a) Calculate the velocity of the bullet before it hits the block. b) . . . continues Click to Purchase Solution	Force & Laws of Motion

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