Please may you help me in this homework.  A roller coaster is at rest on the top of a 30m hill (point A). The car starts to roll down the hill and reaches point B, which is 10m above the ground, then rolls up the track to point C which is 25m above the ground.  A) a student assumes no energy is lost, and solve for how fast the car is moving at point C using energy arguments. What answer did he get? B) if the final speed at C is actually measured with asonar gun and is found to be 2.0m/s, what percentage of the energy was not conserved? ( not conserved) what happened to the energy?

Q: a.An atwoods machine consists of two blocks, A (m=1.3 kg) and B (m=8.7kg). Block B is released from…

A:

Q: 2. A 60 kg skier slides down a hill, and their potential energy versus horizontal position (x) is…

A:

Q: A sledder has 500 J of potential energy and 230 J of kinetic energy at one point on a steep hill. a.…

A:

Q: 6. A standard baseball has around 146 g. If a ball comes off a bat with 30 W of kinetic energy, how…

A: Note: The unit of kinetic energy mentioned in the question is incorrect, considering the unit of…

Q: A 2-kg brick is thrown downward from a height ?1 = 15 m to ?2 = 10 m. The initial kinetic energy of…

A:

Q: 10. A person jumped into the ocean from a car which was 320 m above the water's surface. He had a…

A: Given: mass of person, m = 94 kg  Initial height of person, h1 = 320 m final height, h2 = 75 m

Q: 1. A 6.2kg box is moving at 2.4m/s to the left. a) What is its kinetic energy? 2.4m/s 6.2kg b) How…

A: Given data:  Mass (m) = 6.2 kg Initial velocity (u) = 2.4 m/s Work done by the friction (W) = -4 J…

Q: Suzie Lavtaski (m=60 kg) is skiing at Bluebird Mountain. She is moving at 15 m/s across the crest of…

A: The formula of kinetic energy is  K = 0.5 mv2  The formula of the potential energy is  U =  m g h…

Q: A rope with 30 N tension pulls a 10 kg case 3 m across a horizontal floor starting from rest. The…

A:

Q: A 25 kg box is pushed up a ramp that makes a 15 degree angle with the horizontal.  The ramp is 15…

A: (a)Work done by ramp is zero when friction is negligible.      (b)Work done by gravity is:-…

Q: Bob can throw a 334 g rock with a speed of 28.49 m/s. He moves his hand forward 0.91 m while doing…

A:

Q: You push a 10kg box across the floor. After it leaves your hand, it’s moving at 3m/s. a.What type…

A:

Q: You push your physics book 2.40 m along a horizontal tabletop with a horizontal push of 3.00 N while…

A: Given data: Displacement (d) = 2.40 m, horizontal Horizontal puch force (F) = 3.00 N Force of…

Q: A box is being pushed to the right with 112N of force. The box travels a total of 1.5m to the right.…

A:

Q: 17. A child (mc=26.1 kg) on a bicycle (mb=11.2 kg) goes down a hill as shown. 7.6 m 5.6 m He starts…

A:

Q: ow many forces are applied to the car? Please list their names. Do these forces do work? Why? Please…

A: Given:- The mass of the roller coaster car m = 1000 kg   The height of point 1  is h = 60 m  The…

Q: a skater moving at 3.0 m/s encounters a rough patch that reduces her speed by 45% due to a friction…

A: Initial speed of the person is u=3 m/s Final speed on rough patch is v=45% of u Friction force is…

Q: 2. A rock is shot straight up into the air with a slingshot that had been stretched 0.30 m. Assume…

A:

Q: 3 meters above the base.

A:

Q: With what minimum speed must you toss a 200 gg ball straight up to just touch the 14-mm-high roof of…

A: Mass of ball is m=200 g Initial height of ball is hi=1.1 m Maximum height or final height is h=14 m…

Q: A B A student builds a roller coaster as shown. The heights of the points are A= 2.1 m B= 0.9 m C= 0…

A: Given the stone is released from the point A with height hA = 2.1 m so the initial velocity is zero…

Q: There is a 23.1 kg box that starts with an initial velocity of 23.5 m/s. The box moves up a hill…

A:

Q: B U(x) = A 6-kg particle moves in a region of space where its potential energy is + with a = -4.9…

A: Given data-  Mass m=6 kg  Potential energy U(x)= (a/x) + (B/x2)             a=-4.9 J.m , B=2.1 J.m2…

Q: A B C A student builds a roller coaster as shown. The heights of the points are A= 2.9 m B= 0.7 m C=…

A:

Q: Jim rides his skateboard down a ramp that is in the shape of a quarter circle with a radius of 5.00…

A: This is a question regarding the energy of a body and the work done by friction. The potential…

Q: A 1,000kg roller-coaster car rested at point 1 of height y=60m and started to slide down along a…

A: The given system is of an object moving along a track. Since the track is smooth forces due to…

Q: A puck, mass 0.20 kg, slides on a horizontal ice rink with a speed of (1.47x10^0) m/s. A hockey…

A: This can be solved using the work-energy theorem. As per the work-energy theorem net work done on an…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.