A force of 50 N is applied to the end of a lever, which is moved a certain distance. If the other end of the lever moves one-third as far, how much force can it exert?

Q: The rate at which work is done is known as .

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Q: a compact car climbs a hill in 10 s.  The top of the hill is 30 m higher than the bottom, and the…

A: Given data: -  The time required to climb is t = 10 s. The height of the hill is h = 30 m. The mass…

Q: An object only has mechanical energy when it is moving. True or False?

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Q: If a force of 60 lb stretches a 10-in spring to 14 inches, find the work done in stretching the…

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Q: A compact car can climb a hill in 10 s. The top of the hill is 30 m higher than the bottom, and the…

A: Calculate the potential energy of the car at the top of the hill. PE=mgh    =1000 kg9.81 m/s230 m…

Q: To reduce the power needed to run an appliance by 1/3, how much work is needed if the time taken to…

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Q: An engine develops 10 kW of power. How much time will it take to lift a mass of 250 kg to a height…

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Q: A fisherman is about to reel in a 9-lb fish located 15 ft directly below him. If the fishing line…

A: Given, Weight of fish, w1=9 lb, height, h= 15 ft, and weight of line, wl=1 oz/ft=1516lb=0.94 lb.

Q: If an input force of 202 N is applied to the handles of the wheelbarrow with a mechanical advantage…

A: The input force applied to the handles is, The mechanical advantage of the wheelbarrow is,

Q: A person weighing 548 N gets on an elevator. The elevator lifts the person 5 m in 11 seconds. How…

A: Given data:      Weight of the person (mg) = 548 N      Height reached (h) = 5 m      Time taken to…

Q: A 2-kg block of wood is pushed by horizontal force of 10 N to a distance of 3 m. The work done…

A: Given:  Mass of block m= 2 Kg Force applied F= 10N Distance d= 3m

Q: A person who weighs 80 pounds walked up two flight of stairs in 5 minutes. Each flight of stairs has…

A: The expression for find work is W=F·d Substitute values in the above equation…

Q: An object which weights 10N is dropped from rest from a height of 5 meters above ground. When it has…

A: (given) Weight (mg) of an object = 10 N Thus, the mass of the body is, m=Wg=10 N10 m.s-2=1 kg…

Q: If 5 J of work are needed to stretch a spring 10cm beyond equilibrium, how much work is required to…

A: Given Data Work required to stretch the string is W1=5 J The spring is stretched by a length x1=10…

Q: A shopping cart moves with a kinetic energy of 40 J. If it moves at twice the speed, its kinetic…

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Q: 100 feet and weighing A chain, with length h 3 pounds per foot, hangs over the side of a building.…

A: Given:  Total length of the chain = 100 ft Weight of the chain = 3 pound per feet

Q: How much work is done if you push with 40N on the side of a box and the box moves 40m

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Q: The rate of doing work is known as

A: In physics, the rate of doing work is known as Power. It is equivalent to an amount of energy…

Q: A force of 50N is applied to the end of a lever, which is moved a certain distance. If the other end…

A: Step 1Force that is applied to the end of a lever isTo find the force exerted when the other end of…

Q: A 50-kg sack is lifted 2 m in the same time as a 25-kg sack is lifted 2 m. The power expended in…

A: The equation for the power is given by

Q: Calculate the amount of work done in raising a block of mass 5 kg through a height of 40 cm.

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Q: Two cars have the same mass of 1,162 kg. One of the cars is moving 1 times as fast as the other is.…

A: Given, Two car having same mass of, m1 = 1162 kg, m2 = 1162 kg Now the one of the car is moving 1…

Q: A hollow block of mass 3 kg is lifted to a height of 10 m in 3 minutes. What is the average power in…

A: The mass of the hollow block, m=3 kg   The height, h=10 m   The time duration, t=3 min=3 min×60 s1…

Q: During a bench press, does the amount of work, or power, required depend on the rate at which the…

A: The amount of work done is the product of the force applied and the distance through which the…

Q: A force of 4 N will stretch a rubber band 8 cm (0.08 m). Assuming that Hooke's law applies, how far…

A: The spring force,  F=4 N   The spring stretches the distance,  x=0.08 m

Q: A pump needs to lift 549 litres of water per minute to a height of 14.7 m.  What is the minimum…

A: Power is defined as the rate of doing work. The work done in this case is just the change in the…

Q: Does the work done in lifting an object depend on how fast it is lifted? Does the power expended…

A: Work is given by where It can be seen that work is not time dependent. So, the work done does not…

Q: An unstretched spring is 10 ft long. A pull of 40 lb stretches the spring by 22 ft. Find the work…

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Q: If a 600 N student climbed a 15 ft flight of stairs in 8 sec, what horsepower did that student…

A: Given data: Weight (mg) = 600 N High (h) = 15 ft Time (t) = 8 s Required: The power (P) in…

Q: if the book falls off the shelf, what will be its speed when it hits the ground.

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Q: In an input of 100J in a pulley system increases the potential energy of a load by 60J , what is the…

A: Given:Input energy = 100 JOutput energy = 60 J

Q: A crate of mass 50 kg is being pulled with a force of 30 N at an angle. The work done to pull the…

A: Given data:  Mass (m) = 50 kg Force (F) = 30 N Displacement (d) = 15 m Work done (W) = 300 J…

Q: A man pushes very hard for several seconds on a heavy rock, but the rock does not budge. Has the man…

A: To determine Work done by the man

Q: A spring, whose equilibrium length is 2 m, is compressed to a length of 1 2 m when a force of 10 N…

A: Equilibrium length of spring (L) = 2 m Compressed length (l) = 1.2 m Applied force (F) = 10 N

Q: A simple lever is used to lift a heavy load. When a 62-N force pushes one end of the lever down 1.3…

A: As the work done by both the forces, that is applied force and weight force will be equal. Write the…

Q: How much power is used if a force of 35-6 newtons is used to push a box a distance of ?10 meters in…

A: Power is rate of doing work  P=W/t

Q: An unstretched spring is 10 ft long. A pull of 40 lb stretches the spring by ½ ft. Find the work…

A:

Q: A 100-lb boy runs up a staircase to a floor 15 ft higher in 5.45 s. His power output is.     Six…

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Q: If you lift a box using a 100 J of work within 5 s, how much power has been done? How much is the…

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Q: A 40-kg mass is lifted through a distance of 20 m in a time of 3 s. What average power is employed?

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Q: A box is moved using 200 N of force over a distance of 15 m. If the box is moved in 1.4 seconds, how…

A: GivenForce Applied on box, F=200 NOver a Distance, d=15 mTime taken,t=1.4 s

Q: A man pushes a lawn mower on a level lawn with a force of 189 N. If 28% of this force is directed…

A: Given data *The given force is F = 189 N *The given time is t = 16 s *The displacement is d = 5.5 m

Q: Lifting a weight to a height of 20 m takes 20 s for one crane and 10 s for another. Is there any…

A: Given:  height,h = 20 m  t = 20 s  t' = 10 s

Q: What is the power done by gravity to make a ball of mass 0.68 kg roll from 1.3 m above the ground to…

A: Power = Energy/time P=E/t E=mgh m=0.68 kg h=1.3 m  g=9.8 m/s^2   E=0.68*1.3*9.8 = 8.6632 J t=2.68 s

Q: A man pushes a lawn mower on a level lawn with a force of 203 N. If 53% of this force is directed…

A: The force acting on the lawn mover is F=53% of 203N=53100×203=107.59N

Q: How much power was expended by a car if it exerts a force of 1500.0 N and moves at 20.0 m/s?

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Q: If a machine exerts a force of 250 n of an object and no work is done what must have occurred

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Q: A force of 20 N acted upon a 5kg object, lifting it 1.5m. Calculate the work done on this object.

A: Given: The mass of the object is 5 kg. The force on the object is 20 N. The displacement of the…

Q: • A farmhand pushes a 26-kg bale of hay 3.9 m across the floor of abarn. If she exerts a horizontal…

A: Expression of work done -  W=F×sWhere,F = Force s = Distance