When a conservative force does positive work on a body, the potential energy ofthe body increases/decreases/remains unaltered.

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: A crane lifts a 650-kg beam vertically upward 23.0 m and then swings it horizontally a distance of…

A: Given: The mass of the beam is 650 kg. The vertical displacement of the beam is 23 m. The horizontal…

Q: need asap pls A 5.0 kg experiences an applied force of (3i + 7j) N as it slides across a horizontal…

A: Given: Applied force, F=3i + 7j N Displacement across a horizontal surface, d=7.0 m   To determine…

Q: A rock of mass 0.050 kg is thrown upward with an initial speed of 25 m/s. Find the work done by…

A: Given data: Mass of rock is, m=0.050 kg. Initial speed of throwing the rock is, u=25 m/s.

Q: How much work did the movers do (horizontally) pushing a 160-kg crate 10.3 m across a rough floor…

A: Since the crate is moving acceleration, the pusher must do a work to overcome the frictional force.…

Q: How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals 746 W) to…

A: Use work energy theorem

Q: A package rests on the floor of an elevator that is rising with constant speed. The elevator exerts…

A: An elevator moving up with constant speed

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 5.6-kg box slides a distance of 13.0-m. If the coefficient of kinetic friction is 0.33, what is…

A: The given data   The mass of the box m = 5.6 kg The distance moved by the box is d = 13 m The…

Q: The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.

A: Write the expression for the work done.

Q: Cite an example in which a force is exerted on an object without doing work on the object.

A: The work done will be zero when the applied force on an object is perpendicular to the displacement…

Q: In physics, what conditions must be satisfied if work is to be done?

A:

Q: If you apply a deforming force on an object and let it come to equilibrium, what happened to the…

A: The work that we do on the body will be stored in the body in the form of strain energy.

Q: thou a displa Is pusned norizontal Newtons. Non-conservative forces (friction) remove 14 Joule stem.…

A: Given values:- Displacement,(d)=3 m -----(1) Force,(F)=89 N -----(2) Non-conservative forces work…

Q: A 1500 kg car accelerates from a uniformly stationary state at a speed of 10m / s in 3s. Find the…

A: Write the variable with the given values.

Q: A force of 12 lb is required to hold a spring stretched 2 in. beyond its natural length. How much…

A: Scenario - Work is done to stretch a spring beyond its original length. Given, Force→F=12 lb Initial…

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

A: To determine Work Done

Q: A student lifts a 1.42-kg book from her desk to a bookshelf. If thegravitational potential energy of…

A:

Q: How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals 746 W) to…

A: Given data: The mass of the car is, m= 850 kg The useful output power is, P=40 hp=29840 Watt The…

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

A:

Q: If you walk 2.0 m horizontally forward at a constant velocity carrying a 20-N object, what is the…

A: Given Data : The distance travelled horizontally is given as d = 2 m The weight of the object is…

Q: When a spring is stretched , is the work done by the stretching force positive or negative?

A:

Q: Why is it tiring to push hard against a solid wall even if no work is done? A 75 kg firefighter…

A: Q 1) We get tired because we use our energy to contract the muscles. We try to push the wall using…

Q: A ball was launched upwards and vertically at a speed 3 m/s up to a height 4 m. What the work done…

A:

Q: If it takes 6.00 J of work to stretch a Hooke's-law spring 15.0 cm from its unstressed length,…

A: Given Data: Work Done to stretch spring from unstressed length to 15 cm = 6 Joule We have to find…

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: The same amount of force is applied on the box in 3 different ways. In which situation will the work…

A: we know  work done = force in the direction of displacement *  displacement. so basically work done…

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: ure shown, if the mass (m=8 Kg) is moving with constant speed and traveled a distance d=15 m, what…

A: Given that Block is moving at constant speed, So that means acceleration of block in horizontal…

Q: Two objects are each displaced the same distance, one by a force F pushing in the direction of…

A:

Q: If 2.0 J of work is done in raising a 0.180 kg apple, how far is it lifted? (Remember: F = mg)

A: Given  Work done W=2J Mass of apple m=0.18kJ

Q: When a punter kicks a football, is he doing any work on theball while the toe of his foot is in…

A: The punter can only be applying a force when he is in contact with the football. Therefore the…

Q: A car accelerates uniformly from rest to 20.0 m/s in 5.6 s along a level stretch of road. Ignoring…

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: In the figure shown, if the mass (m=6 Kg) is moving with constant speed and traveled a distance…

A:

Q: How much work must you do to push a 11.0 kg block of steel across a steel table (μk=0.6)at a steady…

A: a) The required work done is,

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

A:

Q: How much work is performed in steadily dragging a sled 20 m horizontally when the force of 80 N is…

A:

Q: What is the dominant factor that affects the speed of an object that started from rest down a…

A: Work done on an object

Q: An object has an initial kinetic energy of 100 J. A few minutes later, after a singleexternal force…

A: The initial kinetic energy of an object,   The final kinetic energy of the object,

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: now much work does he do on the crate?

A: We know the work done W=F. d------------------(1) ANS: The work done is 919.24 N-m or 920 Joule.

Q: On a playground slide, a child has potential energy that decreases by 1000 J while her kinetic…

A: The dissipative force involved during sliding motion is the frictional force between the ground and…

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

A: Work is defined as the scalar product of force and displacement. That is,  W=F→.d→ ⇒W= Fdcosθ Where…

Q: 2.5 F est across a floor at the rate of 2.01m/s- for 8.5s. Find the net work done on the box.

A: Work done = Force × Displacement  If force and displacement are in same direction

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.

Q: A box of mass 20.0 [kg] slides down from the top of a surface inclined at 50.0º with height of 10.0…

A: