5m μ 7. A mass m = 2 kg is released from the top of an incline plane 5 m long and at an angle of 37° to the horizontal. The mass slips to the bottom of the incline, strikes a spring which compresses and projects the mass back up. The coefficient of friction between the mass and the incline is μ = 0.2. Using energy principles, find how far back up the incline the mass m moves before it comes to rest. 700002 k 37° E m

1. A Roller Coaster showing in the picture bellow of mass of M=149 Kg is moving through the 3 hills until the end of the rid. if the first hill has Hight of H1=24 m, the second hill H2 = 17 m and the Third hill H3= 12 m. calculate the following: First hill M Scale 1.0 cm 3.0 m Second hill hill ⠀⠀ End of ride a) Potential energy at the maximum height (first hill) in (J) : b) The Kinetic Energy in the second hill :: c) the velocity of the car in the third hill :: d) The velocity of the car at the end of the rid (e) Kinetic energy at the end of the hall (J) :

When a car is moving at constant speed, the developed potential is used to overcome the frictional forces exerted by the air and the road. If the power developed by the motor is 50.0 hp, what is the total frictional force acting on the car at 24.6 m / s? 1 hp = 746 W.

In the figure below an object of mass m starts from rest on a roller coaster with negligible friction. A hA B hB C hc Ꭰ hp (a) What terms are present in the object's mechanical energy? Choose from E O Gravitational potential energy, Spring potential energy, Kinetic energy, Work done against friction O Gravitational potential energy, Spring potential energy, Kinetic energy Spring potential energy, Kinetic energy, Work done against friction, Gravitational potential energy, Kinetic energy because, there is no friction (b) Mechanical energy is conserved Only conservative forces ◆ act. (c) Calculate the speed of the object at point D (VD) in terms of the following variables: (g, ha, hD)

Determine the energy required to accelerate a 1,155-kg car from 10 to 60 km/h on an uphill road with a vertical rise of 46 m. Please give your answer in kJ.

What are the energy and average power output by a 55 kg cyclist would be required to ride up a 5 km long hill with 5% gradient in 15 minutes?     Question 2 options:   Energy 13750 and power 90 W   Energy 268430 and power 300 W   Energy 132100 and power 200 W   Energy 134750 J and power is 150 W

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A 1200-kg sports car is advertised to accelerate from 0-100 km/h (27.78 m/s) in 3.00 s. What is the power output of the car in hp? 1 hp = 746 W 01 207 hp 325 hp 200 hp 175 hp

Problem 6: Part (a)  What is the force in the x-direction, in newtons, on this particle at x = 8.0 m? Fx = ______ Part (b)  If the total energy is 19.5 J, what is the speed of the particle at x = 8.0 m? v (8.0 m) = ______

A car with a mass of 2000 kg starts at rest from a point 30 m above the ground. At point B, it is 15 m above the ground. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 20 000 J, what is the kinetic energy of the car at point B? (g= 10 m/s2).