A person of weight 490 N stands on a scale in an elevator. What will the scale be reading? when the elevator is accelerating downward at 6 m/s² А. 190N В. 790N

You are standing on a bathroom scale inside an elevator. Your weight is 144 lb, but the reading of the scale is 112 lb. a. What is the acceleration of the elevator? If the acceleration is in upward direction, enter a positive value and if it is in downward direction, enter a negative value. answer in m/s^2 b. see attached

. a. Consider two parachutists, a heavy person and a light person, who jump from the same altitude with parachutes of the same size. Which person reaches terminal speed first? Which person has the greater terminal speed? Which person reach the ground first? If there were no air resistance, as on the moon, how would your answers to these questions differ?

A and Block B are connected by a cable of negligible mass going over a frictionless pulle, of negligible mass. If the coefficient of friction between Block A is 0.2 and Block A has a mass of 2Kg and Block B has a mass of 3Kg ,\\na. What is the downward acceleration of Block B?\\nb. What is the tension in the cable?

A wrench is dropped from the top of a tall tower. It takes 3.07 s to reach the ground. How tall is the tower, in meters? Assume the wrench’s initial velocity is zero, use 9.80 m/s2 as the acceleration due to gravity, and assume air drag does not matter.

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A 10 m/s В A 1000-kg Jeep travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the Jeep encounters an unbanked curve of radius 50 m. The Jeep follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the Jeep changes from east to south. ... 50 m N C W E S What is the magnitude of the acceleration of the Jeep as it travels from B to C? A 10 m/s? в) 5 m/s? C 20 m/s2 D 2 m/s2

7. The effects of atmospheric drag cannot be deglected, in general, on the dynamics of objects moving through the air. The drag force is found to be FD where p is the density of air, A is the cross sectional area of the object, v is the object's velocity, and Cp is the so called drag coefficient. For a baseball Cp is measured to be - .5ρA Cp υ?, .3. (a) If the baseball is launched vertically with a speed of 90 miles per hour, how high will it travel? How would the answer change ignoring air resistance? (b) What is the speed of the baseball when it comes back down? How would the answer change if there was no air resistance? (c) How long does it take for the baseball to go up? Down? How would the anwers change in the absence of air resistance?

M 30° The pulley and all surfaces are frictionless. Suppose both blocks are made of solid gold. In addition, each block has a mass of 2.08 kg. Find the tension (in N) in the connecting the two gold blocks.

To withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." 10 g's is an acceleration of 98 m/s². If the length of the centrifuge arm is 15.0 m, at what speed is the rider moving when she experiences 10 g's? Express your answer with the appropriate units.