An 80.0 kg spacewalking astronaut pushes off a 660 kg satellite, exerting a 120 N force for the 0.580 s it takes him to straighten his arms. Part A How far apart are the astronaut and the satellite 1.10 min after the push begins? Express your answer with the appropriate units. d=
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- Block 1 with mass 66 kg is sitting on a horizontal frictionless surface as shown below. It is attached to a string of negligible mass that goes over a pulley with negligible mass and negligible friction. The other end of the string is attached to block 2 with mass 254 kg. Find the magnitude of the common acceleration of the two blocks! A. a = 37.75 m/s² B. a = 13.25 m/s² C. a = 5.76 m/s² D. a = 0 m/s² E. a = 7.79 m/s² 1 2A woman stands on a scale in a moving elevator. Her mass is 72.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9390 N. What does the scale read during the acceleration? NA cardboard box rests on the floor of an elevator. The box has a mass m = 2.75 kg and the elevator has an upward acceleration of a. a. Write an expression for the sum of the forces acting on the box in the y-direction, ΣFy, given that up is the positive y-direction. Your answer should be in terms of FN, m, and g. b. Write an expression for the normal force, FN, that the block experiences in terms of the elevator's acceleration, the block's mass, and the acceleration of gravity. c. If the elevator's acceleration has a magnitude of g in the downward direction, what would the normal force, FN1 be in Newtons? d.If the elevator's acceleration had a magnitude of g in the upward direction, what would the normal force FN2 be in Newtons?
- A teenager of mass m1 = 56 kg pushes backwards against the ground with his foot as he rides his skateboard. This exerts a horizontal force of magnitude F foot = = 18.5 N. The skateboard has m2 = 2.6 kg. a. Write an expression for the magnitude of the horizontal component of force that the ground exerts on the teenagers foot, F ground. b. Write an expression in terms to given quantities for the magnitude of the skateboard acceleration, a , while the teenager is pushing backwards on the ground? c. What is the numerical value of the magnitude of the acceleration, a, in m/s square?At a time when mining asteroids has become feasible, astronauts have connected a line between their 3360-kg space tug and a 5770- kg asteroid. They pull on the asteroid with a force of 380 N. Initially the tug and the asteroid are at rest, 356 m apart. How much time does it take for the ship and the asteroid to meet? Number Units aT apTwo objects with masses of m1 = 2.90 kg and m2=7.70 kg are connected by a light string that passes over a frictionless pulley. a. determine the tension in the string( Enter the magnitude only) b. determine the acceleration of each object. ( enter the magnitude only) c. determine the distance each object will move in the first second of motion if both objects start from rest.
- Å A student tries to push a 27.7 kg desk across the room. She pushes at a downward angle of 39° (measured from the horizontal) with a force of 240 N. As a result, the desk moves with a constant velocity of 1.22 m/s. How much friction is present? F₁ = How much does the desk weigh? 11 N FN = Fg How much Normal force must be present? N N+ Blocks of mass m₁ and m₂ are connected by a massless string that passes over the pulley in the figure (Figure 1). The pulley turns on frictionless bearings, and mass m₁ slides on a horizontal, frictionless surface. Mass m₂ is released while the blocks are at rest Figure m₁ m₂ < 1 of 1 Assume the pulley is massless. Find the acceleration of m₁. Express your answer in terms of some or all of the variables m₁, m2, and constant g. 19] ΑΣΦ) a₁ = 0.684m₁ Submit Previous Answers Request Answer Part B X Incorrect; Try Again; One attempt remaining d 17 ΑΣΦ ? Find the tension in the string. Express your answer in terms of some or all of the variables m₁, m2, and constant g. P Pearson ?Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 15 N force applied to the 3.0 kg block. Part A How much force does the 4.0 kg block exert on the 5.0 kg block? Express your answer with the appropriate units. HA F4.0 on 5.0 = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B How much force does the 4.0 kg block exert on the 3.0 kg block? Express your answer with the appropriate units. HA F4.0 on 3.0 = Value Units
- A 1800 kgkg car starts from rest and drives around a flat 50-mm-diameter circular track. The forward force provided by the car's drive wheels is a constant 1000 NN . Part A What is the magnitude of the car's acceleration at t=13st=13s? Express your answer to two significant figures and include the appropriate units. aa =v Question Completion Status: QUESTION 18 As shown in the figure below, a force pushes two mass bodies (mass m, and m) together moving to right horizontally with a constant acceleration on a frictionless and as shown above. With E=10 N, m, = 11 kg, and m,= 13 kg, what is the surface, In the contact surface between m, and m., there are contacting forces E 21 magnitude of F, N Please write your numerical answer with all digits and do not use (Note: For fill in blank, I have set the unit for the answer. So, you just need to provide a number scientific notation. If you are not sure about the number of significant figures, you can keep the number of figures as many as possible - You will not be punished for doing this.) F21 m1 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to search