7. Calculate the efficiency of a machine that produces 125 J of work by using 175. J of energy.
Q: 2. If a car engine delivers 50.0 hp of power, how long will it take for the engine to do 4.60 x 10^5…
A: Power is defined as the amount of energy transferred or converted per unit time. It is also defined…
Q: Find the work done when lifting a 45 lb crate from the ground up onto a 7 ft high shelf.
A: Given in question - Force(F) = 46 lb Displacement(D) = 7 ft To…
Q: The coefficient of kinetic friction between a suitcase and the floor is 0.272. If the suitcase has a…
A:
Q: What is the efficiency of a machine that produces 23 J of work from an input of 55 J? A. 32 %…
A: Given data: Work done (Wout) = 23 J Input energy (Ein) = 55 J Required: Efficiency of the machine
Q: 4. In a time t=18.00 s, a 60.0-kg student runs at a steady pace up two flights of stairs whose…
A: Given data: Time (t) = 18.00 s Mass (m) = 60.0 kg Vertical height (h) = 7.80 m Required: Power…
Q: 3. A horizontal force of 5.0 N is used to push a box up a ramp 5.0 m long that is at an angle of 15°…
A: Answer: Given, Horizontal force, F=5N Length of ramp, d=5m Angle above the horizontal, theta = 15°…
Q: 5. You must exert a force of 4.5 N on a book to slide it across the table. If you do 2.7 J of work…
A:
Q: A boy pushes his little brother in a box with a force of 500 N for 324 m. How much work is this if…
A:
Q: 3. Bart runs up a 2.91-meter high flight of stairs at a constant speed in 2.15 seconds. If Bart's…
A: Given value--- height = 2.91 m. time = 2.15 sec. mass = 65.9 kg. We have to find--- work done ?…
Q: 6. Research the power of two different things and report back their power in watts Eg. An onland…
A: 6. Power is amount of energy transferred or converted per unit time. A solar panel can produces…
Q: . A 6N force acts on a 5kg mass over a distance of 3m. What is the work done on the object? If the…
A:
Q: 3. A train covers a distance of 15 km and that the force is causing it to accelerate at a rate of…
A: Let us find the work done by the given data.
Q: Calculate the force needed to do 500 J of work while pulling a cart a distance of 3.4 m.
A:
Q: You carry a 20. N bag of potatoes up a 5.0 m flight of stairs in 26 seconds. How much work was done?…
A:
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. On a level road, you phyllis a 25.7kg wagon with a force of 29.4 newtons for a distance of 16.7…
A: We have a wagon of mass m=25.7 kg on which a force of magnitude F=29.4 N is applied to movie it to a…
Q: n engine releases 1675 J of energy per cycle and performs 200J of work. What is the value of power i
A: Given Work done by the engine is W=200 J Time taken is t=0.89 s
Q: Calculate the work done by a 1500 watts appliance if it runs for 300 seconds
A: As per our guidelines, we are supposed to answer only first one question in case of multiple…
Q: 2. A 1200 kg car is moving at 30 m/s and speeds up to 35 m/s. Find the work done on the car.
A: According to the work energy theorem, the work done is equal to the change in Kinetic energy,…
Q: what is the kinetic energy in joules of a 1120-kg automobile traveling at 88 km/h? 2. how much…
A: Given, Mass, m = 1120 kg Speed, v = 88 km/h = 88×518=24.44 m/s
Q: 4. If it takes a 100-N force to lift one shovel full of snow up 1.5 m, how many shovels full could…
A: Solution:-Given thatForce (F)=100 NDisplacement (d)=1.5 mTotal energy (E)=28 kJ=28000 J
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: An eighteen-wheeler truck of mass 42.0x10 kg moves a speed of 32.0 m/s on a highway. Determine (a)…
A:
Q: 1. A 500 kg load is lifted to a height of 20 meters by means of a pulley block which has an…
A: Given information: Here, m is the mass of the load, h is the height up to which the load is to be…
Q: 5. How much work is done (how much energy is required) to accelerate a 1987.5 kg car entering the…
A: Given: The mass of the car is 1987.5 kg. The initial speed of the car is 18.271125 m/s. The final…
Q: You can use a stone under a plank of wood to lift a heavy rock. i. State the type of machine that…
A:
Q: 2. calculate the kinetic energy of a 0.134kg baseball traveling at 21.6m/s 3. how much work was done…
A: Given that- Mass of baseball(M)=0.134 kg Speed(v)=21.6 m/sec To determine that calculate the kinetic…
Q: 6. A truck weighing 1,000 kg runs at 120kph carrying a load of 1,200kg at its back. It travelled at…
A: The correct option is 0J Because,
Q: 3. An electric motor used to lift an elevator has power rating of 26.74 kW. If it can carry a…
A:
Q: UP A 46.00 kg block starts from rest at the top of a 25.0 m long 30.0° incline. Its kinetic energy…
A:
Q: 10. A machine is used to move a 700 N object by 2.00 m by exerting 400 N of force through a distance…
A:
Q: 5. Calculate the work being done on 2000 N crate, being lifted 2 meters off the ground by a crane.…
A:
Q: 4. A motor having an efficiency of 90% operates a crane having an efficiency of 40 %. With what…
A: Speed of the object lifted depends on the Ratio of the gear or pulley which enable the motor shaft…
Q: 2. A spring has a natural length of 10in and a 30lb force stretches it to a length of 12in. Find the…
A: Given, Natural length of the spring = 10 in 1 inch = 0.0254 m Therefore, 10 inch = 0.254 m F = - K…
Q: 4. A force of 80 N used to push a chair across a room does 320 J of work. How far does the chair…
A: Solution as
Q: A power output of 18.0 h.p. is required to overcome friction and move a certain car at a constant…
A: The power required to move a body at a certain velocity is given by P = F×v, where F = the force…
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…
Q: A forklift uses 5200 J of energy to lift a 50.0 kg mass to a height of 4.0 m at a constant speed.…
A: To calculate the efficiency of the forklift, we need to compare the useful output energy (the…
Q: How much work is done in moving a 130-kg crate along a rough floor 3.6 m without acceleration if the…
A: Solution: As there is no acceleration, the applied force,F =…
Q: 3. A force of 10 N is applied to a small cart for a distance of 2.0 m. (a) What work is done on the…
A:
Q: If you have a ball with a mass of 6.00kg, that has an initial velocity of vA=(2.00i + 5.00j)m/s and…
A: Given value--- mass = 6 kg. initial velocity =( 2i + 5j ) m/s. final velocity = (-2i + 8j) m/s. We…
Step by step
Solved in 3 steps
