Rectilinear Motion 2. A 75 kg man stands on a spring scale in an elevator. During the first 3 secs of motion from rest, the tension T in the hoisting cable is 8300N. Find the reading R of the scale in N during this interval and the upward velocity v of the elevator at the end of the 3secs. The total mass of the elevator, man, and scale is 750kg. Ans. 830 N & 3.77m/s T=8300 N $+ 750(9.81) 7360 N R 75(9.81)= 736 N

A 70.0 kg skydiver falls toward the earth. The force due to air resistance is 1200N.  What is the accelaration of the skydiver?   I got 7.34 m/s.  Can you help me with this.

Determine the force Q-> when the block moves with constant velocity. Express your answer in vector form.

THE MASSES Ma and Mb SLIDE ON THE SMOOTH INCLINED PLANES (WITHOUT FRICTION). DETERMINE  A FORMULA FOR THE ACCELERATION OF THE SYSTEM IN TERMS OF mA,mB θA, θB AND g. B) IF θA= 32, θB=23 AND mA= 5.0kg, what value of MBwill keep the system at rest? What would be the tension in the string in this case (neglect mass)?

3.9

An Atwood machine consists of two masses hanging from the ends of a rope that passes over a pulley. Assume that the rope and pulley are massless and that there is no friction in the pulley. If the masses have the values ?1=19.5 kg and ?2=12.5 kg, find the magnitude of their acceleration ? and the tension ? in the rope. Use ?=9.81 m/s2.

An elevator filled with passagers has a mass of 1583 kg . The elevator decelerates at a rate of 0.600 m/S2 for 5.50 s . What is the tension in the cable in N during deceleration

An 5000 kg elevator is decreasing speed on the way up. The tension in the cable supporting the elevator is 40, 000N What is the magnitude and direction of the acceleration of the elevator?

A person on a sled starts descending from the highest point of a snowy slope with a 30º inclination and 150 m in length. The combined mass of the person and the sled is 90 kg. At the end of the slope, they continue moving on a horizontal track until they stop. The coefficient of friction between the sled and the snow is \( \mu = 0.18 \) in both cases. 1. Draw the forces acting on the sled in each section.  2. Calculate the mechanical energy dissipated due to friction on the inclined section.  3. With what speed does it reach the end of the slope?  4. What distance does the sled travel on the horizontal plane before stopping?

A 9 kg fish hangs from a fishing line. The fish is lowered, such that the tension in the line is 60% of what the tension would be at rest. What is the magnitude of the acceleration of the fish? Answer to 3 sig figs.