Choose the BEST answer to the following: A machine cannot multiply (a) forces. (b) distances. (c) energy. (d) None of these.

Q: When you lift a box with a mass of 350 kg to a height of 2.5 meters, how much work have you done?

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Q: What is energy? O Inertia O A substance derived from matter O The ability to do work O A push or a…

A: Energy is defined as the ability to do work. It is the ability to exert a force that causes a…

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: Work equals force times

A: Work is a measure of the energy used in applying a force to move an object.

Q: - How much work is done when Allen applies a force of 200N to drag an 80kg crate 8.0m across the…

A: Introduction :  In this question we are provided with value of force and distance . with these data…

Q: It takes 18 foot-pounds of work to stretch a spring 4 inches from its natural length. Find the work…

A: The work done to stretch the spring is W=12kΔx2 Here, k is the spring constant, ∆x is the…

Q: When a jumbo jet slows and descends on approach to landing, there is a decrease in both its kinetic…

A: According to the law of conservation of energy, the energy cannot be created or destroyed, but it…

Q: Calculate the work done when a force of 5 N moves a book 1.2 m. (Remember that 1 N?m 5 1 J.)

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Q: A force  of 750 lbs stretches a spring 3 inches from its natural length of 15 inches. The work done…

A: Given data:  Force (F) = 750 lb Stretch in spring (x) = 3 in Required: Work done to stretch spring…

Q: How much work is done by an applied force to lift a 15-Newton block 3.0 meters vertically at a…

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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: Show that 50 W of power is required to give a brick 100 J of PE in a time of 2 s.

A: Power = Work done /Time Work Done = Change in Potential Energy = 100 J

Q: An apple weighing 1 N falls throughas a distance of 1 m. How much work is done on the apple by the…

A: weight of apple(W)= 1N Distance(d)=1m Work done=F.d=Fdcosθ F is force θ is angle between force and…

Q: A person does some work of 1,000 J in 2 s. His power will be ...... A) 1000W B) 25W C) 500W…

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Q: While pushing her younger brother on a swing, Ivy exerted an average force of 56 N through a…

A: Given Data : The average force exerted by Ivy is given as F = 56 N. The distance covered by ivy…

Q: Jack and Jill are both helping to fetch a pail of water in a hill that is 16 meters high. Each of…

A: Given: mass of water m = 5 liter = 5kg distance travelled d = 16m time taken by Jack t1=1.5hrs  time…

Q: Which requires more work - lifting a 50-kg sack a vertical distance of 2m or lifting a 25-kg sack a…

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Q: Show that 2.4 J of work is done when a force of 2.0 N moves a book 1.2 m.

A: Work done = Force x Distance moved by the force = Fd W = 2.0 N x 1.2 m W = 2.4 N.m = 2.4 J

Q: A ball of 0.1 kg is dropped from rest. When it falls through a distance of 2 m, the work done by the…

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Q: What is the work required to raise a 200 kg barbell to a height of 1.25 m? Round off to the nearest…

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Q: Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30s,…

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Q: How much work is needed for a 75-kg runner to accelerate from 3.2 m/s to 5.2 m/s?

A: Given:             Mass of runner M=75kg           Accelerates from 3.2 m/s

Q: Calculate the work performed by a horse pulling a wagon Forward with 200 N of a force across a…

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Q: If you push a cart with a force of 60 N resulting in 120 J of work, how far did you move the cart?

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Q: Calculate the power output in watts and horsepower of a shot-putter who takes 1.20 s to accelerate…

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Q: If a box having a weight of 100 N is kept at a height of 20 m , calculate its Gravitational…

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Q: Calculate the work done when a force of 15 N moves a body by 5 m in its direction.

A: Introduction :  In this question we are provided with value of  force and displacement . with these…

Q: Calculate the work done on a laptop with a mass of 2 kg when it is pushed 0.5 m with a force of 5 N.

A: Given: F = 5 Ns = 0.5 m To find: Work done(W)

Q: An elevator is carrying a load of 1550kg, 75 meters up in 4 minutes. The counterweight is 1150kg.…

A: Given that---- m = 1550 kg h = 75 m t = 4 min Question ❓ Work done by an elevator = ? And power need…

Q: How much work is done in lifting your classmate with a mass of 72kg 1.3m off the floor?

A: Given: The mass of the classmate is 72 kg.            The distance is 1.3 m.  To determine: The work…

Q: when we say work is done against a force we mean the force does

A: work is done against the force means that the direction of displacement is opposite to the direction…

Q: anet with a net force of 250 now all work, including the

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Q: If a force of 14.7 N is used to drag the loaded cart (from previous question) along the incline for…

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Q: How much work is required to throw a ball with a mass of 0.44 Kg 23.4 m/s?

A: Here in this question we consider the ball initially is in rest.                 i.e. vi = 0 m/s.…

Q: Calculate the kinetic energy and potential energy of a 600 kg car up hill at 20 meters and is runnin…

A: kinetic energy = 12mv2 potential energy = mgh

Q: how much work is done if you slide a 20kg box along the floor by applying a force of 25n for 6…

A: Given:- m=20 kg F=25N r=6m Find the work done(W). w=F.r

Q: How much work is required to lift at 3.10 KG object from the bottom of a well 11.1 M deep?

A: Let h denotes the depth of the well, m denotes the object’s mass, U denotes the potential energy of…

Q: Which requires more work—lifting a 50-kg sack a vertical distance of 2 m or lifting a 25-kg sack a…

A: Since the sack is lifted in vertical direction, work should be done opposite to the gravity.

Q: How much work (in J) is done when a force of 888.0 N is exerted while pushing a crate across a level…

A: Given that, Force = 888.0 N Distance = 1.32 m

Q: What is the amount of work done when JoAnne throws a baseball 6.5 meters at a force of 40 newtons?

A: Applied force by JoAnne (F) = 40 N Baseball is thrown for a distance (d) = 6.5 m To find : Work done…

Q: Find the mass of an object if it requires 700 W of power to raise it to the height of 70 m in 1.1…

A: Power = 700 W  Mass = M Height = 70 m  Time = 1.1 minutes

Q: A horizontally directed force of 10 N is used to pull a box a distance of 2.6 m across a tabletop.…

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Q: A stone is thrown up in the air and just barely makes into onto the roof of a garage. When is its…

A: Kinetic energy of any object is given by :- KE =  (1/2)mv2 Kinetic energy of stone will be maximum…

Q: How much work is required to life a 6.0-kg backpack 1.5m to put it on?

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Q: A 3.0 kg ball is lifted two meters upward in two seconds, and a 6.0 kg ball is lifted one meter…

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