Determine how much work is required to stop a 900-kg vehicle from an initial speed of 25 m/s. O 24 000 J O 540 000 J 12 000 J 820 000 J 280 000 J
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- How much work must be done by frictional forces in slowing a 1000.0 kg car from 19.8 m/s to rest? O 6.22 x 105 J 1.96 x 105 J 5.33 x 105 J 4.44 x 105 J 3.55 x 105 Jhow much power in watts is required to accelerate a 1200 kg car from rest to 16 m/s in 8 seconds against a constant air resistance of 350 NA crane slowly lifts a 263 - kg crate a vertical distance of H = 13.0 m. mg crane F crane (a) How much work does the crane do on the crate? Enter to 3 significant figures W H 0 33,500 (b) How much work does the gravity do on the crate? Enter to 3 significant figures X√J XVI W gravity (c) What is the total work done on the crate? Enter to 3 significant figures ✓J W total = -33,500
- 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.Rory carries a 150-N suitcase up three flights of stairs (a height of 3.5 m) and then drag it along the floor with a horizontal force of 40.0 N at a constant speed of 0.50 m/s through a distance of 5.0 meters. How much work does Rory do on his suitcase during this entire motion? 525 J 725J 200J 5,145 JA 1200-kg sports car is advertised to accelerate from 0-100 km/h (27.78 m/s) in 3.00 s. What is the power output of the car in hp? 1 hp = 746 W 01 207 hp 325 hp 200 hp 175 hp
- A railroad locomotive accelerates a 95,000-kg railcar from 10 m/s to 25 m/s in 90 seconds. What was the average power transferred to the boxcar during this process? 25 MW 280 kW 330 kW 2.3 MW 48 kW10.0 m + 8.0 m A 2.4 kg flower pot is on a shelf 10.0 meters above the floor. How much work was done to move the object to a shelf 8.00 meters above the floor? floor A 240 Joules B 192 Joules 48 Joules D 24 Joules O O O OA particle moves in the x-axis from x = 12.8 m to x = 23.7 m under the influence of a force where F is expressed in newtons and x is expressed in meters. Use numerical integration to determine the total work done by the force during the displacement. In the networks there are Various calculators for integrals are available.
- You are out on the road with your friends, when you suddenly run out of gas. You and your friends apply a cumulative force of 103 N to push the car 96 m to the nearest gas station. What is the work done on the car?The figure below shows the force on an onion moving along the x-axis. Calculate the work done as the onion moves from 2 m to 7 m. (Assume an accuracy of 3 significant figures for the numbers on the graph.) F (N) 7 6 LO 5 4 3 2 1 W = 1 1 1 2 3 4 56 7 8 9 J ·x (m)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?