III. WORK 8. How much work was done by a machine that exerts a 5000 N force to compress a 10-meter-long steel bar so it becomes 3 meters in length. A. 15 kN B. 65 kN C. 50 kN D. 35 kN 9. Find the angle between the 500 N applied force and the 3-meter displacement if the work done is 1500 Joules. A. 30 degrees B. 90 degrees C. 0 degree D. 60 degrees Explain why is that answ

Q: 1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the…

A: Work done by boy W= mgh Given that m= 5kg  h= 0.7m

Q: (1) a 60-meter tall hill and rolls down the slope at an angle of 45°. (a) A 100 kg roller coaster…

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Q: A 48 g particle is moving to the left at 12 m/s. How much net work must be done on the particle to…

A:

Q: An 8.0-g bullet has a speed of 800 m/s. (a) What is its kinetic energy? (b) What is its kinetic…

A:

Q: 5. (a) What is the kinetic energy in joules of a 1000kg automobile traveling at 90km/h? (b) How much…

A:

Q: 4. A 250-N force accelerates a 25.0-kg crate from rest along a horizontal frictionless surface for a…

A:

Q: 1. A horse is towing a canal boat, the tow rope making an angle of 10 with the towpath. If the…

A: Given data: Angle θ=10° Tension T =20N Displacement S = 50m

Q: 1. A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height…

A: Since you have posted multiple questions we will solve the first question for you .If you want any…

Q: 59. a. Find the amount of work done in lifting a 50-lb weight upward 5 ft. b. If 200 N of force is…

A: a. the amount of work done is W=Fd=50 lb5 ft=250 lb-ft

Q: 3. A certain force applied on an object is depicted below. (a) What is the work done by the force…

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Q: 2. A spring on a horizontal surface can be stretched and held 0.5 meters from its equilibrium…

A: Given: The stretching in the spring due to force 50 N is 0.5 m from the equilibrium.

Q: . A 0.10-kg steel ball drops to the floor from a height of 2.0 m and then rebounds to a height of…

A:

Q: 1. A spring with a natural length of 10 cm is stretched by 0.5 cm by a 12 Newton force. Find the…

A: Answer Given data Natural length l = 10 cm Force F = 12 N Spring stretched by x = 0.5 cm

Q: (I) How much work must be done to stop a 925-kg car traveling at 95 km/h?

A: Given :-      Mass of the car (m) = 925 kg       Initial velocity (v) = 95 km /h (or) 26.39 m/s

Q: 3. Suppose you lift a 20 kg box by a height of 1.0 m. a) How much work do you do in lifting the box?…

A:

Q: 11. (i) A small 35g toy rocket is launched straight up from the ground at 108 km/h (a) What is the…

A:

Q: 1. Your best friend's car runs out of gas so they call you for help. Luckily for you there is a gas…

A: Given data:  Displacement (d) = 50.0 m Force (F) = 600.0 N Time (t) = 2 minutes  Required: Work (W)…

Q: Question7 A boy with mass m - 50 kg walks up at h-2 m high stairs at a constant speed in t-25 s.…

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Q: 11. A 2.0-kg piece of gelatin is made to slide down a ramp from point shown. The total distance…

A:

Q: A 5-kg package is pushed 2 m up a ramp that is inclined at 12o above the horizontal by a 100-N force…

A: Note : Since there are multiple sub-parts and as per guidelines we can provide solution to first…

Q: 1- An 18,000g object is accelerated at 2m / s', if the object is displaced 40m. What is the work…

A:

Q: 3. What is the potential energy formula?          a. What is the unit of measurements that each has…

A: potential energy [P.E  or U] PE = mgh where, a. PE is the potential energy of the object in…

Q: 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction…

A:

Q: 5. A 650 newton bicycle racer climbs a 500-meter hill by doing 400,000 joules of work. a) What are…

A:

Q: Q8. A 100-kg file cabinet is sliding down on a frictionless ramp, it moves a distance of 8.0 m.…

A: Given data- mass of file cabinet m=100 kg distance d=8.0 m,  angle θ=10.0°

Q: 4. Explain why we need to go understand the dot or scalar product before learning the concept of…

A: Work done: When an object is displaced by a force in the direction of it's application then the work…

Q: 1. How much mechanical work is done on a brick wall if a man pushing with a 250 N force fails to…

A: We will answer the first question since the exact one is not specified. Please resubmit the request…

Q: 5. A 2-kg object moved from rest to a speed of 10 m/s. a) Calculate the work done on the object? b)…

A:

Q: a person holds a 50 Newton object stationary for 10 seconds, 2 meters above the floor, what is the…

A: The work done is given as product of the force and displacement. W = F x d

Q: A 2 kg block slides on a frictionless surface at 10 m/s. How much kinetic energy does it have?

A: Mass of block, m= 2 KgSurface is frictionless.Velocity,v=10 m/s

Q: 5. A heavy rope is 5 m long whose mass is 30 kg, hangs over the edge of a building 10 m high. a. How…

A: Given: The length of the rope is 5 m. The mass of the rope is 30 kg. The height of the building is…

Q: $3. A cyclist starts from rest and coasts down a 4.0° hill. The mass of the cyclist plus bicycle is…

A: Given: θ=4om = 85 kgd =180 m

Q: Q16. A constant force of (12hat i N acts on a 4.0-kg object as it moves from the origin to the point…

A:

Q: 6. A 1400-kg car is moving at a speed of 25 m/s. How much kinetic energy does the car have?

A: Given Data: The mass of the car is, m = 1400 kg. The speed of the car is, v = 25 m/s. The kinetic…

Q: A 900kg car traveling at 12 m/s increases its speed to 20 m/s . What is the amount of work added the…

A: The mass of the car, m=900 kg   The initial speed of the car, u=12 m/s   The final speed of the car,…

Q: 2. A 155-g baseball is thrown so that it acquires a speed of 35 m's. (a) What is its kinetic energy?…

A: a) The expression for find kinetic energy of the ball is KE=12mv2 Substitute values in the above…

Q: 4. For this problem, try to use only energy considerations in your solution. You are asked to design…

A: Potential Energy of the person = Kinetic energy of the person as hits the netmgh = 12mv2gh = v22v…

Q: 1. An object accelerates from 4 m/s to 9m/s. determine the mass of the object if the net work done…

A: Given:-1)  object accelerates from 4m/s to 9m/s  The net wok done by the objcet is W= 350 J 2) if…

Q: Q7 A ball, of mass m = 1.0 kg slides on a rough path AB. If the ball starts from rest at point A and…

A:

Q: 3. Suppose you lift a 20 kg box by a height of 1.0 m. a) How much work do you do in lifting the box?…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

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.