A crane is lifting a 13, 700 N load from the ground to a height of 41.4 m. If this process takes 24.0 seconds, what is the power put out by the crane?
Q: A car is cruising at a constant speed of 24 m/s. If the frictional force acting on the car is 571 N,…
A: Given: Speed of car v = 24 m/s Frictional force acting on the car f = 571 N
Q: A father is pulling his son on a sledge with a 120 N force at an angle of 45 degrees with the…
A: Given Amount of force is F=120 N Angle is θ=45 degrees with the horizontal Work done is W=400 J
Q: A car of mass 2,200 kg accelerates from rest to a speed of 25 m/s over at distance of 240 m. It…
A: Given Data: The mass of a car is, m=2200 kg The initial speed of a car is, u=0 m/s The final speed…
Q: It takes you 4 seconds to drag a 100 kg sofa 2.5 m across the floor while exerting a constant…
A: Time taken to drag the sofa t=4 s The mass of the sofa m=100 kg The distance moved d=2.5 m The force…
Q: A rocket uses 4 kJ of chemical potential energy stored in the fuel while shooting the 0.55 kg rocket…
A:
Q: Suppose you are employed part time in the stock warehouse at a local Canadian Tire store. You work 5…
A: Work done = Force • displacement
Q: A man pushes a lawn mower with a horizontal force of 138 N. If he pushes the lawn mower 5.2 m in 15…
A:
Q: An elevator has a mass of 3,000 kg and moves 210 m up in 27 s at constant speed. At what average…
A: Given m=3000kg x=210m t=27s
Q: average power delivered
A:
Q: A student who weighs 544 N climbs a stairway (vertical height of 2.6 m) in 27 s. (a) How much work…
A: The objective of the question is to calculate the work done by the student in climbing the stairs…
Q: A girl is snowmobiling 223 m up a slope that is ,5º from the horizontal. The combined mass of the…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: Your job is to lift 30-kg crates a vertical distance of 0.90 m from the ground onto the bed of a…
A:
Q: The figure below shows a person pushing a box with a force of 8.2 N over a displacement of 8.7 m.…
A: Given that:- Force(F)=8.2 N and Displacement(d)=8.7 m Time(t)=5.0 s Work…
Q: A student who weighs 546 N climbs a stairway (vertical height of 3.2 m) in 27 s. (a) how much work…
A:
Q: A 520-kg dragster accelerates from rest to a final speed of 105 m/s in 390 m, during which it…
A:
Q: A weight lifter raises a 125 kg barbell from the ground to a height of 2.0 m. What is the barbell's…
A: Given Mass m = 125 kg Height h = 2.0 m
Q: A motorist runs out of gas on a level road 190m from a gas station . The driver pushes the 1,220 kg…
A:
Q: A motorist runs out of gas on a level road 150 m from a gas station. The driver pushes the 1,120 kg…
A: Given: Distance traveled, d=150 m Mass, m=1120 kg Force, F=180 N Formula: Work=Force×distance W=F×d
Q: A force of 16 lb is required to hold a spring stretched 4 in. beyond its natural length. How much…
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Q: Joe slides a crate along the garage floor. The coefficient of kinetic friction between the crate and…
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Q: A child pulls on a wagon with a force of 75 N. If the wagon moves a total of 30 m in 2.0 min, what…
A: Given , Force = 75 N Displacement s = 30 m Time = 2 minutes
Q: A student who weighs 543 N climbs a stairway (vertical height of 3.3 m) in 24 s. a) how much work…
A:
Q: Catching a wave, a 74.6-kg surfer starts with a speed of 1.18 m/s, drops through a height of 1.80 m,…
A: The initial energy of the surfer is
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: A shooting star is the trail of a meteor - a chunk of debris hurtling through Earth’s atmosphere. As…
A: Energy = (1/2)m(v)2 E = (1/2)(0.002)(100000 * 1609.4/3600)2 E = 1998586.7 Joules Work done =…
Q: A 100 kg weightlifter performs a lift called a clean and jerk, raising a 190 kg bar from the ground…
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Q: Your job is to lift 25.0 kg packaged boxes a vertical distance of 1.0 m from the ground onto the bed…
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Q: A small electric motor is used to lift a 0.50-kilogram mass at constant speed. If the mass is lifted…
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Q: A force of 30 N acts on an object with mass 5kg, and the object is displaced 10 m along a rough…
A:
Q: A motorist runs out of gas on a level road 210 m from a gas station. The driver pushes the 1,120 kg…
A: The work done is defined as the force applied over the distance , thus it is calculated by using the…
Q: A student who weighs 547 N climbs a stairway (vertical height of 2.9 m) in 21 s. (a) How much work…
A: weight = mg = 547 N Height = 2.9 m time (t) = 21 seconds A) Work done = change in potential…
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- When the Glen Canyon hydroelectric power plant in Arizona is running at capacity, 690 m3 of water flows through the dam each second. The water is released 220 m below the top of the reservoir. If the generators that the dam employs are 90% efficient, what is the maximum possible electric power output?A weight lifter bench‑presses a 150.0 kg barbell from his chest to a height equal the length of his arms, 0.850 m. How much work does he do? How many food calories does the weight lifter use if he does this lift 35 times? Assume the weight lifter does no work in letting the barbell drop back to his chest.A 77-kg object starts with a speed of 1.3 m/s, drops through a height of 1.65 m, and ends with a speed of 8.2 m/s. How much non-conservative work was done on the object?
- A crane lifts a load of 1500 kg a height of 25 m at a steady rate, in a time of 2 min. What is the power of the crane?A student with a mass of 50.0 kg climbs a vertical staircase in 28.5 seconds. If the staircase has 14.0 steps and each step is 22.5 cm high, calculate his power output. (Answer to 1 decimal place) Your Answer: Answer unitsA heavy box is pulled by a rope on a horizontal surface. (a) Assume that there is no frictional force between the box and the surface. If the tension force in the rope is 240 N and the box moves by the distance of 5.6 m in 2.9 s, what is the power output of the work done by the tension force? (b) Assume that the surface is rough and there is frictional force between the box and the surface. If the box moves at the constant speed of 0.31 m/s when the tension force is 240 N, what is the power output of the work done by the tension force?
- A heavy rope, 50 ft long, weighs 0.3 lb/ft and hangs over the edge of a building 140 ft high. (a) How much work W is done in pulling the rope to the top of the building? W = ft-lb (b) How much work W is done in pulling half the rope to the top of the building? W = ft-lbA four-meter chain hangs from a ceiling. The chain has a density of 1.5 kilograms per meter. Find the work done if the lower end of the chain is lifted to the ceiling so that it is level with the upper end.a rope applies a hortizontal force of 180 N to pull a crate a distance of 2 m across a floor. A frictional force of 120 N opposes this motion. What is the total work done on the crate?
- You are driving to work at 60 mph and need to accelerate to 75 mph. How long will it take to reach this speed? Express this quantity in units of seconds. Assume the engine is rated at 140 hp and is 25% efficient. The combined vehicle and driver mass is 2970 lbm.You and your friend Gandalf are mowing lawns for extra spending money. Gandalf pushes his mower 25 m and applies a force of 150 N. If you apply a force of 60 N, how far must you push your mower so that the work you do equal Gandalf’s?A motorist runs out of gas on a level road 170 m from a gas station. The driver pushes the 1,140 kg car to the gas station. If a 190 N force is required to keep the car moving, how much work (in J) does the driver do?