(c) A wasp of mass 20g flies vertically up at a speed of 50cm/sec. What is the power generated in its wings?

Q: A bag of wheat weight 320 kg. To what height should it be raised so that potential energy is 6790J?…

A: Given data :                Acceleration due to gravity    =   g                  Potential energy…

Q: A boy carrying a bag on his shoulders walking at angle of 90 degrees does any work or not?

A: Given : A boy carrying a bag on his shoulders walking at an angle of 90 degrees. We know that the…

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 crane lifts a 650 kg beam vertically upward 10.8 m and then swings it westward 18 m. How much work…

A: The formula for workdone is W=Fxcosθ

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: Find the work done by a force of constant magnitude F=0,1KN.If the displacement of the body is…

A: Given data: Force, F=0.1 kN = 100 N Displacement, r=100 mm =100×10-3 m = 0.1 m Angle between…

Q: A toad with mass of 188 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given: Toad's mass, m=188 g=0.188 kg Toad's jumping angle w.r.t horizontal, θ=35° Initial velocity,…

Q: A car with a mass of 900.0 kg climbs a 20.00° incline at a steady speed of 60.00 km/hr. If the total…

A: The steady speed of a car is, v=60 km/hr=16.67 m/s The total resistive or dissipative force acting…

Q: A bag of wheat weight 330 kg .To what height should it be raised so that potential energy is 7800J?…

A: Given data:  Mass (m) = 330 kg Potential Energy (PE) = 7800 J g = 9.8 m/s2 Required: Height (h)

Q: Say I lift a box from the ground straight up to 1m in 2s. If I lift the same box from the ground but…

A:

Q: A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of…

A:

Q: The power delivered by a constant force is given by P=FO-vO, The power exerted by gravity as it…

A:

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

A:

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 mass of 47 kg is moving horizontally as a force of 190 N, directed at 25° below the horizontal, is…

A:

Q: It takes a force of 1450 N to keep a 1300-kg car moving with constant speed up a slope of5.25°. If…

A:

Q: An accelerating object of mass m=5 kg is fired with an initial speed v;=9 m/s at a starting point.…

A:

Q: . A car of mass 900 kg is initially travelling at 50 km/h. If the speed increases so that its…

A:

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

A:

Q: nat is the work done by a 2500 kg car whose velocity is 85 km/hr? und your answer to the nearest…

A: Given value--- mass = 2500 kg. final velocity = 85 km/h. We have to find--- work done

Q: If a person pushes on a lawnmower with a constant force of 90.0 N at an angle of 40° to the…

A: Given data: Constant force (F) = 90.0 N Angle (θ) = 40° to the horizontal Horizontal displacement…

Q: A cyclist in a race must climb a 4° hill at a speed of 5 m/s. If the mass of the bike and the biker…

A: The mass of the bike and the biker together, m=73 kg   The speed, v=5 m/s   The angle, θ=4°

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: A toad with mass of 180 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A:

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: If it requires 9.0 JJ of work to stretch a particular spring by 2.0 cmcm from its equilibrium…

A: Write the expression for the work done by the spring.

Q: A bag of wheat weight 450 kg .To what height should it be raised so that potential energy is 8950J ?…

A: Write the given values with the suitable variables. m=450 kgP=8950 J Here, m is the mass and P is…

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

A:

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: What distance can a crane lift a 55.0 N box, if it expends work of 2.00 x 104 Joules?

A: given ;    force, F = 55.0 N , work done = 2.00 x 104  Joules  formula used;     W = F x d   where,…

Q: Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 70 km/h ?

A: Given data:  Mass (m) = 1500 kg Initial velocity (Vi) = 70 km/h Final velocity (Vf) = 0  Required:…

Q: he work done by a conservative force around a closed path is nonzero.  T  F ??

A: A conservative force is a force done in moving a particle from one point to another, such that the…

Q: If it requires 9.0 J of work to stretch a particular spring by 2.0 cm from its equilibrium length,…

A: The energy required to stretch the spring is

Q: A force F = 3ti acts on a mass m and moves it with a velocity v = 0.5t2i .The instantaneous power…

A: Given that, Power is the dot product of force and velocity.

Q: How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and…

A: Using the conservation of energy, the kinetic energy of the car at the lowest point equals the…

Q: A projectile is fired vertically with an initial velocity of 200 ft/s.Using the law of conservation…

A: Given : Initial velocity, u = 200 ft/s = 60.96 m/s

Q: A baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in…

A: Given: Mass of the ball = 0.25 Kg Speed of the ball = 40 m/s Horizontal distance from home plate =…

Q: oblem 8.6 As shown in Fig. 8.21, consider a 15 kg block being shed up the rough incline by a…

A: Work done = FS Cosθ

Q: A bag of wheat weight 430 kg. To what height should it be raised so that potential energy is 7790J?…

A: Given data :                 Acceleration  due to gravity    =   g                         Potential…

Q: A toad with mass of 190 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: given , mass of the toad , m = 190 g =0.190 Kg Angle with respect to the horizontal , θ = 37∘…

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

A: Decreases

Q: Why does one get tired when pushing against a stationary wall when no work is done on the wall?

A: Work done can be calculated as the product of the displacement and the force applied.

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest.