A 63.4 kg person is standing inside an elevator. The elevator is moving upward at 2.78 m/s and is decreasing speed at a rate of 1.75 m/s^2. What is the net force that is acting on the person?
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A 63.4 kg person is standing inside an elevator. The elevator is moving upward at 2.78 m/s and is decreasing speed at a rate of 1.75 m/s^2. What is the net force that is acting on the person?
The write the expression for the net force,
Apply Newton’s second law of motion,
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- Two blocks, each of mass m = 3.50 kg, are hung from the ceiling of an elevator as in Figure P4.33. (a) If the elevator moves with an upward acceleration a of magnitude 1.60 m/s2, find the tensions T1 and T2 in the upper and lower strings. (b) If the strings can withstand a maximum tension of 85.0 N, what maximum acceleration can the elevator have before a string breaks? Figure P4.33 Problems 33 and 34.A man inside the elevator stands in a weighing scale and weighs 120 N when stationary. What will be its apparent weight if the elevator is accelerating downward with a magnitude of 7 m/s^2.a. FN = 53.234 Nb. FN = 69.435 Nc. FN = 34.373 Nd. FN = 45.345 NAn astronaut moves in space with a constant speed. If he is far from the influence of gravity of any star or planet, what is the minimum force required in order for him to keep on moving? a) force equal to its weight b) force equal to its mass c) force depending on its speed d) zero
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- You are standing on the floor of a stationary elevator. You weigh 85 kg, what is the magnitude of the normal force the floor exerts on you?A 83.2 kg person is standing inside an elevator. The elevator is moving upward at 2.54 m/s and is decreasing speed at a rate of 1.82 m/s^2. What is the normal force that is acting on the person?What happens on the force of gravity exerted by the earth to a rocket propelling away from it? a. The force decreases inversely proportional to r b. The force decreases inversely proportional to r^2 c. The force increases directly proportional to r d. The force increases directly proportional to r^2