When a punter kicks a football, is he doing any work on theball while the toe of his foot is in contact with it? Is he doingany work on the ball after it loses contact with his toe? Are anyforces doing work on the ball while it is in flight?

Q: In the figure shown, if the mass (m-9 Kg) is moving with constant speed and traveled a distance d=20…

A: Multiple question. Answer for first image is provided below. Given : Mass, m = 9 kg Force, F = 10N…

Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A: Work-done by a force F over displacement 'd' is given by: W = F.d W = F*d*cos theta Given that: F =…

Q: If it takes 4.00 J of work to stretch a Hooke's-law spring 5.0 cm from its unstressed length,…

A: The work done is given by  W = 12Kx2 where,  K is the spring constant and x is the stretch length.

Q: A 50-kg cavan of rice is pulled along a 10-m horizontal ramp with a force of 750 N. If it is dragged…

A: Given: Mass (m) = 50 kg  Force (F)  = 750 N  Displacement (d) = 10 m

Q: If an automobile were to have a 100% efficient engine, transferring all of the fuel’s energy to…

A: The efficiency of automobile is 100 %. This means that the efficiency is 1.

Q: Is it possible to increase the kinetic energy without the application of external force?

A: yes the kinetic energy will increase without applying any external force. for example, when we kept…

Q: A record for stair climbing was achieved by a man who raced up the 1600 steps of the Empire State…

A: Given data from question,  Number of steps = 1600 Height = 320m Time taken = 10.2min Weight of man =…

Q: It takes a force of 35.17 Newtons to stretch a 34-cm spring to 81-cm and hold it there. How much was…

A:

Q: A gardener pushes a lawn roller through a distance of 20 m. If he applies a force of 196 N in a…

A:

Q: Suppose you are jogging at constant velocity. Are you doing any work on the environment and vice…

A: To determine Work Done

Q: The work done on an object moving parallel to the force acting on it is: O OJ O at maximum O…

A:

Q: how much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor…

A: The expression for the required work done is,

Q: What is the total work done by a 75kg man who pushes a box 7m up a ramp that makes an angle of 16o…

A:

Q: As an object moves from point A to point B only two forces act on it: one force is nonconservative…

A: The work done by non-conservative is responsible for the mechanical energy of system. When work done…

Q: One species of Darwin’s finch, Geospiza magnirostris, can exert a force of 217 N with its beakas it…

A:

Q: How much work did the movers do (horizontally) pushing a 43.0-kg crate 10.3 m across a rough floor…

A: Given data:Mass of the crate, M = 43.0 kgDistance moved, d = 10.3 mCoefficient of friction = 0.50

Q: Does the string that supports a pendulum bob do work on the bob as it swings to and fro? Does the…

A: The string applies a force of tension on the bob, which is perpendicular to the bob. When the bob…

Q: In the question given as follows, determine the work done by the constant force :-   The locomotive…

A: Given,  massm=7 tons=7000 kg displacement (d)=0.25 mile=402.336 m

Q: A man pushes a lawn mower on a level lawn with a force of 200N. If only 60% of the totalapplied…

A: Given information: The force on the lawn rover (F) = 200 N The fraction of force used in the…

Q: Give 5 situations in which work is not done on it.

A:

Q: If the ball is dropped with an initial potential energy of 19800J what would be its maximun kinetic…

A: Solution: According to the conservation of energy, total energy of the ball is constant. Hence,…

Q: Discuss whether any work is being done by each of the followingagents and, if so, whether the work…

A: The definition for work is,

Q: Is work a vector quantity? In other words does it need a direction associated with it ?

A: To define work we just need magnitude and not direction. Also work is the dot product of two vector…

Q: a box of mass 3.5 kg being accelerated along the floor at 3.9 m/s2. If this block is being…

A: Given data- Mass of box =3.5 kg Acceleration a=3.9 m/s2 Initial velocity Vi=0 m/s (rest) Time period…

Q: A body of mass m slides a distance d down alom uch work is done by gravity?

A: We know that the let the mass of the body is m and it slide a distance d in the downward direction…

Q: Cite an example wherein  force exerted on a body does no work. Explain.

A: Work done is defined as the product of force, displacement and cosine of angle between force and…

Q: A force of 19.21 Newtons was exerted by a spring to restore its original length from 92-cm to 47-cm.…

A:

Q: How much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor…

A:

Q: F = (2ry – 3)î + x²j, (0, 1) a (1, 0}

A: A force F is given and the work done in moving along three different paths a, b and c is being…

Q: The force needed to stretch a spring by x meters is given by F(x) = 3.6x Newtons. How much work is…

A:

Q: An apple hanging from a limb has potential energy because of its height. If it falls, what becomes…

A: From conservation of energy, just before hitting the ground, the potential energy will convert into…

Q: If you pushed a cart for 3.34 meters along an incline of angle 11.51 by applying a force of 29.67…

A:

Q: Is the work done by the applied force positive or negative when a heavy body is lowered to the…

A: Let h be the height at which the body is initially, F be the applied force, W be the work done by…

Q: Find the work done to displace body of mass by 3 kg with force of 1.3 N upto 2 m

A: Mass of the body, m=3 kg Force on the object, F=1.3 N Displacement of the body, d=2m

Q: A force of 19.91 Newtons was exerted by a spring to restore its original length from 87-cm to 14-cm.…

A:

Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A:

Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A:

Q: A 5.0-kg cart is moving horizontally at 4.0m/s. In order to change its speed to 10.0m/s, the net…

A:

Q: A force of 19.21 Newtons was exerted by a spring to restore its original length from 92-cm to 47-cm.…

A:

Q: Calculate the work done in pushing a 40 kg crate 12 m across a level floor if the cofficent of…

A: Mass, m=40 kg Distance to be pushed, d=12 m Coefficient of friction = 0.4

Q: Lifting 30-kg boxes on a vertical distance of 0.90 m from the ground unto the truck is Ervin's work.…

A:

Q: ) How much work is done when a 50N a Floor pushed along distance 10 m?

A: Given data :- Force F = 50 N displacement d = 10 m

Q: When a conservative force does positive work on a body, the potential energy ofthe body…

A: Decreases

Q: Find out the work done when a force done of 20N displaces a body through 8m in the direction of the…

A: Write the expression for the work done.