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Figure 4.5 shows a force
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University Physics with Modern Physics (14th Edition)
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- (a) Find the magnitude of the gravity force between a planet with mass 5.98 1024 kg and its moon, with mass 7.36 1022 kg, if the average distance between them is 3.84 108 m. (b) What is the acceleration of the moon toward the planet? (c) What is the acceleration of the planet toward the moon? (See Section 7.5.)arrow_forwardAn object of mass m moves with acceleration a down a rough incline. Which of the following forces should appear in a free-body diagram of the object? Choose all correct answers, (a) the gravitational force exerted by the planet (b) ma in the direction of motion (c) the normal force exerted by the incline (d) the friction force exerted by the incline (e) the force exerted by the object on the inclinearrow_forwardThe drawing below shows three particles far away from any other objects and located on a straight line. The masses of these particles are mA = 365 kg, mB = 520 kg, and mC = 142 kg. d1 = 0.436 m and d2 = 0.218 m. Calculate the magnitude of the net gravitational force acting on particle A.arrow_forward
- Which of the following statements is true? a. The bodies interacting exerts equal gravitational force on each other. b. The gravitational constant G varies depending on the medium. c. The less massive object exerts more gravitational force than the massive one. d. The massive object exerts more gravitational force than the lesser one.arrow_forwardTarzan, who weighs 777 N, swings from a cliff at the end of a 16.5 m vine that hangs from a high tree limb and initially makes an angle of 21.9° with the vertical. Assume that an x axis points horizontally away from the cliff edge and a y axis extends upward. Immediately after Tarzan steps off the cliff, the tension in the vine is 721 N. Just then, what are (a) the force from the vine on Tarzan in unit-vector notation, and (b) the net force acting on Tarzan in unit-vector notation? What are (c) the magnitude and (d) the direction (measured counterclockwise from the positive x-axis) of the net force acting on Tarzan? What are (e) the magnitude and (f) the direction of Tarzan's acceleration just then?arrow_forwardIf Spacecraft X has twice the mass of Spacecraft Y, then true statements about X and Y include which of the following? I. On Earth. X experiences twice the gravitational force that Y experiences. II. On the Moon, X has twice the weight of Y. a) Only I is true. b) Only II is true. c) Both I and II are true. d) Niether I nor II are true.arrow_forward
- If a net horizontal force of 132 N is applied to a person with mass 60 kg who is resting on the edge of a swimming pool, what horizontal acceleration is produced? 2.2 m/s^2 No answer 22.2 m/s^2 29.20 m/s^2 7920 m/s^2arrow_forwardAn object moving upward cannot be considered free-falling a.Sometimes true b.Always false c.Sometimes fals d.Always true What refers to the force perpendicular to the velocity of an object moving along a curved path?a.Centrifugal force b.Reverse-effective force c. Centripetal force d. Normal force A uniform bar of mass m is supported by a pivot at its top, about which the bar can swing like a pendulum. If a force F is applied perpendicularly to the lower end of the bar as in the diagram, how big must F be in order to hold the bar in equilibrium at an angle θ from the vertical? a.(mg/2) sin (θ)b.(mg/2) cos (θ)c.2mg cos (θ)d.mg sin (θ)e.2mg sin (θ)arrow_forward
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