The figure presents a skier at Point A, at the top of a ski jump, which curves steeply downward and to the right, passes through point B, and then curves back upward and ends at point C. The height at point A is h sub 1, the height at point B is 0 meters, and the height at point C is 10 meters. h sub 1 is greater than 10 meters. A ski jumper starts from rest from point A at the top of a hill that is a height h1 above point B at the bottom of the hill. The skier and skis have a combined mass of 80 kg. The skier slides down the hill and then up a ramp and is launched into the air at point C that is a height of 10 m above the ground. The skier reaches point C traveling at 42ms. (a) Calculate the height h1. Question 2 (b) Calculate the speed of the skier as the skier reaches point B. Question 3 (c) Is the work done by the gravitational force on the skier as the skier slides from point A to point B positive or negative? ____ Positive ____ Negative Justify your answer. 4 The skier leaves the ramp at point C traveling at an angle of 25° above the horizontal. (d) Calculate the kinetic energy of the skier at the highest point in the skier's trajectory. Question 5 (e) i. Calculate the horizontal distance from the point directly below C to where the skier lands. Question 6 ii. If the angle is increased to 35°, will the new horizontal distance traveled by the skier be greater than, less than, or equal to the answer from part (e)(i) ? ____ Greater than ____ Less than ____ Equal to Justify your answer. After landing, the skier slides along horizontal ground before coming to a stop. The skier’s initial speed on the ground is the horizontal component of the skier’s velocity when the skier left the ramp. The average coefficient of friction μ is given as a function of the distance x moved by the skier by the equation μ=0.20x. (f) Calculate the distance the skier moves between landing and coming to a stop.

A copper disk at 850 degrees celsius rotating about its axis with an angular speed of 25 rad/s in the outer space. As the disk radiates infrared light, its temperature falls to 20 degrees celsius. No external torque acts on the disk. Does the angular speed of the disk change as it cools?

You wish to build a linear accelerator that will accelerate electrons to ?=89 % of the speed of light. You want adjacent drift tubes to be at +5000V and −5000V potentials. To work this problem, you will need the relativistic formula for kinetic energy. (?=??2/2 doesn't work for really fast particles.) Kinetic energy is ?=?0(?−1) where ?0 is the rest energy of an object. The rest energy of an electron is 0.511 MeV. [Remember that if we want to convert eV to SI units, all we have to do is put ?=1.60×10−19 C into the equation; however, for this problem, it's easiest just to leave everything in eV.] How many drift tubes do you need? Hints: The energy an electron gains is ??=??? in each gap. Just find the total kinetic energy by using the formula. Remember that you need one more drift tube than there are gaps. Range of answers: 45 to 115

hint: β= 90.7 %, correct answer is 72

β= 86.9, correct answer is 54

A block with a mass of 2.50 kg on a spring has displacement as a function of time given by the equation
x(t)= (7.9 cm) cos [5.5 rad/s) t - 2.42 rad].

Part A: what is maximum kinetic energy during oscillation? (.......J)

Part B: what is the velocity of block at t = 2.3 s ? (.....m/s)

Part C: if kinetic energy and potential energy are equal, what is the positive value of the displacement? (X=.....cm)

After an unfortunate accident occurred at a local warehouse, you were contracted to determine the cause. A jib crane collapsed and injured a worker. An image of this type of crane is shown in the figure. The horizontal steel beam had a mass of 90.20 kg90.20 kg per meter of length, and the tension in the cable was T=12040 NT=12040 N. The crane was rated for a maximum load of 500 kg500 kg. If d=5.870 md=5.870 m, s=0.558 ms=0.558 m, x=1.200 mx=1.200 m, and h=1.980 mh=1.980 m, what was the magnitude of WLWL (the load on the crane) before the collapse? The acceleration due to gravity is g=9.810 m/s2g=9.810 m/s2. What was the magnitude of force FPFP at the attachment point P?

An asteroid of mass 2.6×105 kg , traveling at a speed of 25 km/s relative to the Earth, hits the Earth at the equator tangentially, and in the direction of Earth's rotation, and is embedded there. Use angular momentum to estimate the percent change in the angular speed of the Earth as a result of the collision.

A microscope with a tube length of 200 mm achieves a total magnification of 400

A 5.00-m-diameter garden pond is 0.500 m deep. Solar energy is incident on the pond at an average rate of 400 W/m2. If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 16.0 ∘C to 19.0 ∘C?

An ideal gas is brought through an isothermal compression process. The 3.00 mol of gas goes from an initial volume of 222.0 × 10 − 6 m 3 to a final volume of 123.5 × 10 − 6 m 3 . If 7.60 × 10 3 J is released by the gas during this process, what are the temperature T and the final pressure p f of the gas

A pendulum is constructed from a thin, rigid, and uniform rod with a small sphere attached to the end opposite the pivot. This arrangement is a good approximation to a simple pendulum (period = 5.87 s), because the mass of the sphere (lead) is much greater than the mass of the rod (aluminum). When the sphere is removed, the pendulum is no longer a simple pendulum, but is then a physical pendulum. What is the period of the physical pendulum?

Take temperatures and efficiencies to be exact.
A monatomic ideal gas (? = 1.67) is compressed adiabatically from a pressure of 3.00

1- Pick 3 favorite thermal engine cycles

2- Draw PV diagram for each (label each step in the cycle)

3- Give >1 example of an application for each engine

4- Calculate work for each engine

The figure above shows four very thin parallel planes of charge with equal separation between them.  
The charge density on plate 1 is 3 nC/m₂.
The charge density on plate 2 is 4 nC/m₂.
The charge density on plate 3 is 2 nC/m₂.
The charge density on plate 4 is -4 nC/m₂.
Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction.

I am unable to put the image but it is point A then plate 1- point B then plate 2 and so forth..

How do the equations of motion change between the stance phase of running and the double support phase of walking if the task was to create the equations of motion between the person on the ground?