A 75.0-kg man stands on a bathroom scale in an elevator that accelerates from rest to 30.0 m/s in 2.00 s. (a) Calculate the scale reading in newtons and compare it with her weight. (The scale exerts an upward force on her equal to its reading.)
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- A person has a mass of 60.0 kg. She is standing on a scale in an elevator that is at rest. The elevator starts accelerating upward at a rate of 2.10 m/sec2. (a) What force does the scale show? (b) How far has the elevator moved upward at t = 3.15 seconds? (c) What is the speed of the elevator at t = 3.15 seconds?A 35.0-kg dolphin decelerates from 12.0m/s to 7.50 m/s in 2.30 s to join another dolphin in play. What is the deceleration of the dolphin? What average force was exerted to slow him if he was moving horizontally? (The weight of the dolphin is balanced by the upward buoyant force of the water.)A 200 kg steel crate is being pulled up a steel ramp, inclined 25 degrees. The crate is attached to a massless rope, around a frictionless pulley. Hanging over the edge of a cliff, and attached to the other end of the rope, is a 300 kg counterweight. a) Is the 200 kg steel crate moving up the ramp? b) If so, what is its acceleration?
- A 70.0-kg man is standing on a scale in an elevator that is accelerating upward at a rate of 2.00 m/s2. What will the scale read?Consider a person standing on a scale in an elevator. If the elevator accelerates upwards with an acceleration of 1.27 m/s2 and the person has a mass of 79.2 kg, what would the scale read? HINT: you need to take into account the acceleration due to gravity, as well as that of the elevator.A body weighing 2 kg was acted upon by a horizontal force of 3 N. What speed will the body acquire in 5 s in the absence of friction?
- Find the scale reading in Newtons of a 74 kg man stands on a scale in an elevator. At the instant, the elevator has a downward acceleration of 5 m/s2 and an upward velocity of 7 m/s. (only numbers in the box)While driving down a road in your car that has a mass of 1300 kg, you notice that your speed is 25 m/s.After going a distance of 1.0 km, you notice your speed is then 27 m/s. What was the magnitude of the forceresponsible for the acceleration over that distance, assuming that the acceleration was constant?While an elevator of mass 2530kg moves upward, the force exerted by the cable is 27.6 kN. (a) What is the acceleration of the elevator? (b) If at some point in the motion the velocity of the elevator is 1.20m//s upward, what is the elevator's velocity 4.00s later?