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Get college assignment help at uniessay writers In Fig. 7.11, a block of mass 2.0 kg is placed on a compressed vertical spring that is compressed 0.050 m. (The spring and the block are not attached.) The spring is released, and it propels the block vertically upward. When the block has risen 0.60 m above its initial position, its velocity is 1.7 m/s. How much potential energy was originally stored in the spring? See attachment. Please provide step-by-step method.

A 3.40 kg steel ball strikes a wall with a speed of 9.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right is the positive direction.)

A 3.10 {rm g} bullet moving at 290 {rm m/s} enters and stops in an initially stationary 3.40 {rm kg} wooden block on a horizontal frictionless surface.

A space station in the form of a large wheel, 283 m in diameter, rotates to provide an “artificial gravity” of 9.5 m/s2 for people located at the outer rim. What is the frequency of the rotational mo- tion for the wheel to produce this effect? Answer in units of rev/min.

250.0 gram industrial mold absorbs 5,575 calories of heat when it is filled with an alloy. If the specific heat of the mold is 0.275 calories per gram degree Celsius, how much does its temperature rise?

A diver stands at the end of of a massless diving board. (a) if the mass of the diver is 134kg and the board is 9m long, what is the torque due to gravity on the diving board with a pivot point at the fixed end of the board?

A 44-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 150 J from 440 J. How high does she rise during this interval? Neglect air resistance.

Mary and Sally are in a foot race (see figure ). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.54 m/s^2 to the finish line. What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally? Express your answer using two significant figures.

A banked circular highway curve is designed for traffic moving at 54 km/h. The radius of the curve is 201 m. Traffic is moving along the highway at 51 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?

Review Interactive Solution 5.35 before beginning this problem. Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is 6.80 times that of satellite B. Find the ratio of the period of satellite A to that of satellite B.

Get college assignment help at uniessay writers A child goes down a playground slide with an acceleration of 1.28 m/s2. find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 25.0 below the horizontal.

Two crates, of mass = 59 and = 131 , are in contact and at rest on a horizontal surface. A 690 force is exerted on the 59 crate. If the coefficient of kinetic friction is 0.16, calculate the acceleration of the system.

a person walks 25.0 north of east for 3.10 km. how far would another person walk due north and due east to arrive at the same location?

A tiger leaps horizontally from a 5.9 m-high rock with a speed of 3.4 m/s. How far from the base of the rock will she land?

A uniform 165- bar is supported horizontally by two identical wires A and B (the figure ). A small 185- cube of lead is placed of the way from A to B. The wires are each 75.0 long and have a mass of 5.50 .If both of them are simultaneously plucked at the center, what is the frequency of the beats that they will produce when vibrating in their fundamental?

Consider the three-pulley arrangement shown in the figure below. The three masses m_1, m_2 and m_3 have the values 2.0 kg, 5.0 kg, and 4 kg respectively. All the pulleys are frictionless, and the strings are massless. What are the tensions in all the strings and what are the acceleration of the masses?

Investigators at the scene of an automobile accident where the driver drove off a 20.0 m high cliff determine that the auto was traveling at a speed of approximately 30 m/s upon impact with the groung. How fast must the car have been moving before leaving the road?

Jack and Jill ran up the hill at 3.4 . The horizontal component of Jill’s velocity vector was 2.3 .What was the angle of the hill?

A shot putter throws the shot with an initial speed of 15.3 m/s at a 35.0 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete’s hand at a height of 2.10 m above the ground.

Two planes approach each other head-on. Each has a speed of 800 km/h, and they spot each other when they are initially 11.0 km apart. How much time do the pilots have to take evasive action?

In Fig. 7.10, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the track at the top of the loop. The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the force of the car on the track when the car is at point A. See attachment for figure. Please provide step-by-step method

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November 3, 2019