Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 4, Problem 23P
To determine
To Find:The force of the air on the parachute.
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Just after opening a parachute of negligible mass, a parachutist of mass 90.0 kg experiences an instanta- neous upward acceleration of 1.00 m/s2. Find the force of the air on the parachute.
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Chapter 4 Solutions
Physics Fundamentals
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- A 72 kg person is parachuting and experiencing a downward acceleration of 2.2 m/s2. The mass of the parachute is 4.8 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute from the person?arrow_forwardAn elevator cab is pulled upward by a cable.The cab and its single occupant have a combined mass of 2000 kg.When that occupant drops a coin, its acceleration relative to the cab is 8.00 m/s2 downward.What is the tension in the cable?arrow_forwardA 1370-kg car is skidding to a stop along a horizontal surface. The car decelerates from 27.6 m/s to a rest position in 3.15 seconds. Assuming negligible air resistance, determine the coefficient of friction between the car tires and the road surface.arrow_forward
- The motion of a very massive object is hardly affected by what would seem to be a substantial force. Consider a supertanker, with a mass of 3.0×108 kg. If it is pushed by a rocket motor (thrust force of a rocket motor is 5.0×106 N) and is subject to no other forces, what will be the magnitude of its acceleration?arrow_forwardA block of mass 47 kg is situated on the floor of an elevator that is accelerating upward at 3.03 m/s2 . What magnitude force does the elevator floor exert on the block?arrow_forwardThe force exerted by the wind on the sails of a sailboat is 390 N north. The water exert a force of 180 N east. If the boat (including its crew) has a mass of 270 kg, what are the magnitude and direction of its acceleration?arrow_forward
- An elevator cab is pulled upward by a cable. The cab and its single occupant have a combined mass of 2030 kg. When that occupant drops a coin, its acceleration relative to the cab is 7.90 m/s2 downward. What is the tension in the cable?arrow_forwardA 547g squirrel with a frontal surface area of 0.0145m2 falls to the ground from a 5.3m tree. Assume the density of air is 1.21kg/m3. What is the terminal velocity, in meters per second, of this squirrel? Use a drag coefficient of 0.70, and assume that down is the positive direction.arrow_forwardA sailboat with a mass of 2.1 x 10^3 kg experiences an ocean current force of 3.45 x 10^3 directed to the east and a wind force against its sails with a magnitude of 6.53 x 10^3 directed toward the northwest (45.0^ N of W)What is the magnitude of the resultant acceleration of the boat?arrow_forward
- A block of mass 132 kg lies on a horizontal plane. A horizontal force F of magnitude 1140 N is applied to the block causing it to move 2.8 meters. If the coefficient of friction between the block and the horizontal surface is 0.36, find the acceleration (in m/s2 ) of the block.arrow_forwardYou drop from rest from a platform 10.0 m10.0 m above the surface of a 6.00 m6.00 m deep pool. Assuming that you enter the water vertically and move through the water with constant acceleration, what is the minimum average force FF the water must exert on you to prevent you from hitting the bottom of the pool? Assume your mass is m=65.0 kgm=65.0 kg and that air resistance during the fall is negligible.arrow_forward60-kg woman in an elevator is accelerating downward at a rate of 1.2 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman's feet?arrow_forward
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