An outfielder throws a 0.150-kg baseball at a speed of 30.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion? Need Help? Read It O Show My Work (Optional) ?
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- A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.Oc below the horizontal. (a) What is the work done on the cart by friction? (b) What is the work done on the cart by the gravitational force? (c) What is the work done on the cart by the shopper? (d) Find the force the shopper exerts, using energy considerations. (e) What is the total work done on the cart?A constant 20-N force pushes a small ball in the direction of the force over a distance of 5.0 m. What is the work done by the force?you psush a file acbinet up a rough ramp titled at 10 degreee with horizontak. The file cabinet has a mass 82kg and you are pushing with a 260N force in the direction up along the ramp. The friction force on the cabinet from the ramp is 35N. It's moved 3.00m up along the ramp. a.whats the workdone by you on the cabinet b. whats the workdone by the frictiion force d. whats the change in gravitational potential energy, positive or negative
- A net force of 70 N accelerates a 3-kg mass over a distance of 12m. a. What is the work done by thhis net force? b. What is the increase in kinetic enery of the mass?A weight lifter lifts a 340-N set of weights from ground level to a position over his head, a vertical distance of 2.35 m. How much work does the weight lifter do, assuming he moves tl weights at constant speed? 799 Need Help? Raad It Talk to a Tutor PREVIOUS ANSWERS SERCP9 5.P.007.SOLN. MY NOTES ASK YOUR TEACH A sledge loaded, with bricks has a total mass of 17.5 kg and is pulled at constant speed by a rope inclined at 20.1° above the horizontal. The sledge moves a distance of 20.6 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? 77.26 (b) How much work is done by the rope on the sledge? 1494.62 Your response is off by a multiple of ten. kJ (c) What is the mechanical energy lost due to friction? 1494.7 Your response is off by a multiple of ten. kJ Need Help? Read It Talk to a Tutor Submit Answer Practice Another Version 3. PREVIOUS ANSWERS SERCP9 5.P.009.SOLN. MY NOTES ASK YOUR TEACHEF W■Pョ…d. When the block crosses the finish line, which hand is farther from the finish line? If both hands are the same distance from the finish line, state so explicitly. Explain. Top view A block and a spool are each pulled across a level, Start Finish diagram at right. The string pulling the block is tied to a hook (not shown) at the center of the front of the block. The string pulling the spool is wrapped many times around the spool and may unwind as it is pulled. The block and the spool have the same mass. The strings start pulling with the same constant force at the same instant. Make the approximation that the strings and the hook are Blockj Same Same tension mass Spool! massless. a. In the spaces provided, draw and label free-body diagrams for the block and spool at an instant while the strings are being pulled. Free-body diagram for block Free-body diagram for spool b. While the block and spool are being pulled, is the magnitude of the acceleration of the block greater than, less…
- The net force on a body varies with time according to the equation below. What is the imp ted to I only need the answers FAST. I neither have the time or questions left on chegg so please answer them correctly. Again I dont need to see the work I just want right answer. please! the body during the time interval t = 0.0 s to t = 2.0 s? to F = 3t2 + 4t- 2 Where F is in newtons and a. b. 24 Ns bo5400939 C. 12 Ns d. 48 Ns $4009398c 398c boThe spead of the car a: the base of 2 10 m hill s 54 kinvh. Assuming the driver keeps her foor off the brake and accelecaror pedals, what will be the speed of the car at che rop of iSpring: A イof ar 20N QI7) A 70. 0 kg ska ter on a frictionless half pi pe has a gravitational Poten tial energy of 1400 jou les at the top of her motion. (Use g= 10.0 N/kg = 10.0 m/s²) Show your workc! 93= %3D 1) How high ground in meter s is the skater とふ Fr a bove the When she starts her run? 2) pipe? What is her Speed at the bottom of the (answer in m/s and convert to mph) 3)What is her speed when she is halfway down pipe? (answer in m/s and convert to mph. the
- A 745-N Marine in basic training climbs a 8.5-m vertical rope at a constant speed in 8.75 s. What is his power output? W Need Help? Read It Watch ItUsing the kinetic ene You might need: Calo A 2.0 kg guinea pig runs at a speed of 1.0 What is the guinea pig's kinetic energy? Round answer to two significant digits. J Show Calculator Stuck? Use a hint.2. A ead slides without friction around a loop-the-loop. The bead is released from a heigh h=3.5 R. R a) What is the bead`s speed at point A. b) How large is the normal force on the ead if its mass is 5g.