While an elevator of mass 812 kg moves downward, the tension in the supporting cable is a constant 7730 N. Betweent=D0 and t= 4.00 s, the elevator's displacement is 5.00 m downward. What is the elevator's speed at t= 4.00 s? m/s k nt
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- KTMDG A box slides from rest down a curved slope. Its initial height is 21 m above the ground, and it comes off the slope 7_m above the ground. How fast is the box moving as it leaves the slope? Assume friction is negligible. A 22. D. 28.11 m/s 15.06 m/s 15.74 m/s 21.52 m/s E. F. 13.37_m/s 16.57 m/s MacBook Pro ن د نے A. B. C. 1--1 Pigshow.jpeg DPig show.jpegA person whose weight is 520 N is being pulled up vertically by a rope from the bottom of a cave that is 35.1 deep. The tension in the rope is 569 N. How long, starting from rest, will it take to bring the person out of the ve?A crate slides down a ramp 24.37 m long inclined at 25.71°. How long will it take to reach the end of the ramp? What is the velocity of the crate upon reaching the end of the ramp? Assume coefficient of kinetic friction = 0.079 .
- A fa Vo B C Fig. 523. Problems 1131-1133. 31/ In Fig. 523, bodies A and Care connected by a weightless flexible cord over a smooth surface B (f = 0). The coeffi- cient of friction f = 1/3. If WA = 64.4 lb., We 96.6 lb., and the initial velocity of A is 30 fps toward the left, find the time in seconds for A to travel 10 ft. Ans. 0.39 sec. except that =A child of mass 26 kg , is sliding down a water-slide that has an angle of 32 deg. If the water lubricates the slide to a frictionless surface, and the slide is 9 meters long. What is the child's velocity at the bottom?A 19 kg block rests on a 26 degree inclined frictionless surface and is attached by a light string to a 31 kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8 m/s2, what is the tension in the connecting string? ROUND TO 3 DECIMAL PLACES
- A cart of mass 8.00 kg was moved by applying two constant forces. Force 1 is 28.0N at 42.0°, and Force 2 is 13.0 N at 110°. Initially, the cart has a velocity of (3.50 i +2.20 j) m/s. EERIN d. What is the acceleration of the cart? Ans. å = (2.05 i + 3.87 j) e. What is the cart's velocity after 5.00 s? or 4.38- Ans. 3 = (13.75 i + 21.55 j)" or 25.56 m mA football is thrown from an initial height of 1.95 m above the ground. The football's initial velocity components are Vi = 6.10 m/s and v₁ = 5.30 m/s. XI Determine the football's maximum height above the ground. Ignore air resistance and any other nonconservative forces. mWhile an elevator of mass 898 kg moves downward, the tension in the supporting cable is a constant 7730 N. Between t=0 and 1= 4.00 s, the elevator's displacement is 5.00 m downward. What is the elevator's speed at f= 4.00 s? m/s
- Moments after making the dreaded decision to jump out the door of the airplane flying at 10,682 feet, a skydiver's 85.4-kg body experiences 116 N of air resistance. The m/s?. magnitude of the skydiver's downward acceleration at this instant in time is Use the approximation g = 10 m/s?. LFBD skydiver small air res.pngA push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to: O W + P cos 0. O W + P sin 0. OW-P sin 0. O W + P. O W. W 0 PThe cable supporting a 2105 -kg elevator has a maximum strength of 23260 N. What maximum upward acceleration can it give the elevator without breaking? Express your answer using two significant figures.