A sledder has 600 J of potential energy and 200 J of kinetic energy at one point on a steep hill. a. How much kinetic energy will the sledder have at the bottom of the hill? [Select] (Assume negligible air resistance and friction.) b. As the sledder goes down the hill and picks up speed, their potential energy will [Select] and their kinetic energy will [Select]

Q: 10. What is the work from 6m to 8m in the diagram below? а. 2J b. 4J C. 6J d. 8J Posten m) (N

A: According to question we need to find work done from 6m to 8m.

Q: A car accelerates from rest to 30kph. La Which takes more energy, going from C 0 to 30kph b. 30 to…

A: Given A car accelerates from rest to 30kph. Later, on a highway it accelerates from 30kph to 60kph

Q: How much work do the breaks on a 3200 kg car need to do in order to slow it from 30 m/s to 20 m/s?

A: Given mass m=3200Kg V1=30m/s V2 = 20m/s According to work energy theorem work done by the car is…

Q: The third floor of a house is 10 m above the street level. How much work is required to lift a 500…

A:

Q: work could an engine that runs

A:

Q: A body does 30 Joules of work in 6 seconds . What is it's power ?

A: Given data :   Work done   =   W    Time taken   =   T        To find :            Power

Q: 6. A 0.150 kg baseball is moving 20.0 m/s. A bat hits it, doing 15.0 J of Work on it. What is the…

A: work energy theorem Wnet=change in kinetic energyWnet=∆KEWnet=KEfinal-KEinitialWnet=…

Q: 1. A 20kg block slides down a slide that is 3.0m high. When it reaches the bottom of the slide, the…

A: Given:mass of block, m = 20 kgheight of slide, h = 3 mspeed of the block, v = 1 m/s

Q: A sedentary person requires about 6 million joules of energy per day. This rate of energy…

A:

Q: You eat a sandwich. Later that day, you walk up a flight of stairs. a. Describe how energy changes…

A: a. The sandwich contains energy in the form of chemical energy.  When I ate the sandwich, this…

Q: 4. An engine that worked for 46 s consumed E = 23,500 J and lifted a in 75 kg body from the ground…

A: Work done for lifting an object from the ground is equal to change in the gravitational potential…

Q: How much work is done (how much energy is required) to accelerate a 1987.5 kg car entering the…

A: According to  work-energy theorem work done is equals to changes in between Final kinetic energy and…

Q: 13. How much mechanical work is required to move a 1.0 kg of blood (roughly 1L) from your feet to…

A:

Q: at point A the skater has 3400 J of PE. At point D the skater has 1600 J of PE. how much KE does a…

A:

Q: When the force is opposite the displacement of the object where it is acting, the force is doing  A.…

A: Solution-: Since force is opposite the displacement of object then angle between force and…

Q: 500 joules of work was done in 10 seconds, the power used was A. 0.025 watts B. 0.025 N C. 40 N D.…

A: Given value--- work = 500 J. time = 10 sec. We need to find--- Power ?

Q: 11. Airflow lifts a 3.6 kg bird 50 m up. How much work was done by the flow?

A: We know that, Law of conservation of energy states that energy can neither be created nor…

Q: . You use 40 J of energy to rise a 250 N object. How far high did you lift it

A: Given Potential energy is U=40 J Weight of an object is mg=250 N

Q: 1. At the end of a 15-min session on a stationary bike at the gym, the bike's display indicates that…

A:

Q: A high-speed swimmer uses 120,000 � of energy in a half-minute race. Three quarters of the energy…

A: a) the one fourth of energy used to oppose the motion which is nothing but 120,000*(1/4) is equal to…

Q: How many joules of work are done on a box when a force of 25 N pushes it 3 m? a 1J b. 3 J c. 8 J 275…

A: Given : Force (F) = 25 N Displacement (d) = 3 m

Q: A 5500 W lathe can move an iron block at a constant speed of 4.3 m/s. What is the force applied to…

A: Given  Power (P)=5500 w speed(v) =4.3 ms-1 Required force(F)=?

Q: 32. A ______________ force is a force that does zero work on a closed path.   a. Non-conservative b.…

A: Work done by conservative force is independent of path and depends only on end points so its 0 in…

Q: The total energy required to move a 10-N block up a 25-degree incline for 10 meters is 500 Joule. A…

A:

Q: 12. When you go upstairs, you a. do more work when you walk than when you run b. do less work when…

A: 12.) Work depends on force and displacement only as force acting during running or walking is weight…

Q: A spring has a spring constant, k, of 100 N/m. How much potential energy is stored in the spring if…

A: Given: The spring constant is 100 N/m. The stretching in the spring is 10 cm.

Q: A ball with 100 J of PE is released from a height of 10 m. What will be the KE of the ball at 5 m?

A:

Q: 64. Which of the following statements is/are true about the value of work done?   a. The work done…

A:

Q: 5. If the sign for work is negative, * O a. Kinetic energy is increasing. O b. Kinetic energy is…

A: work energy theorem. Work done is equal to change in Kinetic energy. W = K.E 2- K.E 1 K.E. 2 -…

Q: A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight back, against the…

A: Given data: Initial Kinetic Energy (KEi) = 52.0 J Force (F) = 12.0 N, straight backward Displacement…

Q: a. How much horsepower does a 25 W household lightbulb consume? (Express your answer using four…

A: Q. Given that Power consumed by lightbulb P = 25 W

Q: b. How much energy was dissipated due to friction in the process?

A: Given, Mass, m=24kgHeight, h=5.0mvelocity,v =2.8m/sacceleration due to gravity,g=9.8m/s2…

Q: A swimmer is on the too of platform which is 10 meters high to prepare himself for the dive. At his…

A: Given  h = 10 m  Potential energy of swimmer at height       h = 10 m  with respect to water surface…

Q: According to the Law of Conservation of Energy, energy can never be destroyed, but merely…

A: Mass of object = 1 kg  Distance to which object is lifted upwards = 5 m  Force applied in upward…

Q: 5. Calculate the work being done on 2000 N crate, being lifted 2 meters off the ground by a crane.…

A:

Q: A 5-kg block slides () along a rough () horizontal surface. The coefficient of kinetic friction for…

A: Given : m = 5 kg μk = 0.40 v = 3.5 m/s

Q: 1. Describe the energy transformations that occur when you climb to the top of a stairway.

A: To discuss the energy transformations that occur when climb to the top of a stairway.

Q: How much work is done when a 4kg block of ice is moved from rest to a speed of 5m/s?   A. 50 J…

A:

Q: Describe a situation where an object is in motion but no physical work is being accomplished.…

A: Consider the situation where a person carrying a suitcase on his head and walking. Now for an…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.