A ball has a total energy of 140 J when it is dropped from rest from a height of 20 meters. Assuming energy is conserved, when the ball is 5 meters above the floor: Q1: What is the total energy of the ball? Q2: What is the potential energy of the ball? Q3: What is the kinetic energy of the ball? Q4: If air friction cannot be ignored, how will the potential energy and the kinetic energy of the ball at 5 meters be affected?

Q: 3. A 5 kg block is initially at rest on a horizontal frictionless surface. Two forces, F = (4 – x2)i…

A:

Q: 3. Consider a 65-kg object moving at a speed of 12 m/s. Use work and energy to solve for the…

A:

Q: A 2 kg block slides down (J) a frictionless incline from point A to point B. A force acts on the…

A: Mass of block = 2 kg Force acting on the block = 2.3 N Kinetic energy of block at point A, = 10 J…

Q: Is this because the other equation for work is W=FsW=Fs, where W is the work, F is the force, and s…

A: In physics, work has totally different meaning. Here, work is said to be done when there is force…

Q: a) Calculate the work done in lifting a 500 N barbell 2.2 m above the floor. b). What is the…

A: Given Weight of the barbell is F=500 N Height above the ground is h=2.2 m Time taken to lift the…

Q: A child has a mass of 18kg and slides down a height of 2.7m without friction.  the gravitiational…

A: Mass, m = 18 kgheight of 2.7m

Q: 3. The energy needed to increase the speed of a certain car from 22 m/s to 54 m/s is 2900 kJ. a)…

A:

Q: What is potential energy? Provide a simple explanation. b) An apple on a tree is hanging 3m from…

A:

Q: A brick lies perilously close to the edge of the flat roof of a building. The roof edge is 50 ft…

A: The potential energy of a mass M at a height h above the ground is given by, U = Mgh Where, g = 32.2…

Q: Imagine you threw a ball straight up, waited for it to come down and then caught it. draw a correct…

A:

Q: A 500 kg roller coaster car traveling on a frictionless surface reaches the top of a 10m hill while…

A: The roller coaster is moving at a speed of 8 m/s at the hill which is 10 m high. So at this point,…

Q: A 450-kg pile driver is raised 15 m above ground. a) Assuming it is raised at a constant velocity,…

A: Write the given values with suitable variables. m=450 kgh=15 m Here, m denotes the mass and h…

Q: Energy of a Roller Coaster Car 500 450 400 350 According to the graph, what is the relationship…

A: The energy of the roller coaster is represented in the graph

Q: A bicycle and rider going 12 m/s approach a hill. Their total mass is 57 kg. (a) What is their…

A: Given Data : speed of the rider, v = 12 m/s total Mass of the rider and the bicycle, m = 57 kg Since…

Q: 2. A spring on a horizontal surface can be stretched and held 0.5 meters from its equilibrium…

A: Given: The stretching in the spring due to force 50 N is 0.5 m from the equilibrium.

Q: How much work is required to lift a 6 kg object from the bottom of a  10 meter deep well?

A:

Q: An object has a kinetic energy of 300 J. The object's mass is tripled, the sıze of the object is…

A:

Q: The total energy of an object at rest 10 m above the ground on a building is 200 J. The object is…

A: Given , Total energy at 10m above the ground = 200 J Height ,h = 10m acceleration due to gravity, g…

Q: A 70-kg hiker hikes from an elevation of 1,209 m to an elevation 2,199 m. i. What is the hiker’s…

A: i) As the hiker moves from a lower elevation to a higher one the gravitational potential energy of…

Q: Q7. You push a 100-kg file cabinet up on a ramp with a force of 500 N, your push force is parallel…

A:

Q: A child slides down a slide without friction.      Compare the kinetic energy K, to the potential…

A: Given data:  Child slides down Friction force is zero

Q: A cart (m = 17 kg) slides along a level track with a velocity of 55 m/s. It then goes down the track…

A: Potential energy depends reference point. In the given question reference point is at origin or at…

Q: 130 kg ball is sliding along a homemade roller coaster at a height of 90 cm and with a speed of 0.35…

A:

Q: A student builds a roller coaster as shown. The heights of the points are A= 3.3 m B= 1.4 m C= 0 m.…

A:

Q: A spring with spring constant k is attached to the floor, standing vertically. You place a box of…

A: The mass of the box is m.The spring constant is k.The acceleration due to gravity is g

Q: Fleas have remarkable jumping ability. A 0.40 mg flea, jumping straight up, would reach a height of…

A: Given:  mass, m = 0.4 mg = 0.4 x 10-6 kg maximum height reached, h = 35 cm = 0.35 m

Q: Benny high on the diving board has a gravitational potential energy of 1,089 J at this point. Then…

A: Given, Initial gravitational potential energy = 1089  Initial Kinetic energy = 0 J  Final potential…