Question 1 (1 point) A ball of mass M at the end of a string in a horizontal circular path of radius R at constant speed of V. Which combination of changes would require the greatest increase in the centripetal force acting on the ball? Halving V and doubling R. O Halving V and halving R. Doubling V and halving R. C Doubling V and doubling R.Question 2 (1 point) A 2000 kg car travels at a constant speed of 12 m/s around a circular curve of radius 30 meters. What is the magnitude of the centripetal acceleration on the car as it goes around the curve? 9600 m/s? 800 m/s2 O 4.8 m/s2 0.40 m/s2Question 3 (1 point) A satellite of mass m is moving around the Earth of mass M in a circular orbit of radius R. The period of the orbit, T, is given by 72 - 112R3 /12GM) T2 - 412R3 /(2 GM?) OT2 - 4TT2R3/( GM) OT2 - 1(2 R3/(GM)Question 4 (1 point) An object travels in a circular path. If the period of the object increases, the object's speed stays the same: speed decreases; speed increases; velocity stays the same; Question 5 (1 point) As a meteor moves from a distance of 16 Earth radii to a distance of 2 Earth radii from the center of Earth, the magnitude of the gravitational force between the meteor and the Earth becomes 64 times as great; 8 times as great; 4 times as great; one eighth as great;Question 6 (1 point) A 1.00 x 103 kg car is driven clockwise around a flat circular track of radius 25.0 m. The speed of the car is a constant 5.00 m/s. What minimum friction force must exist between the tires and the road to prevent the car from skidding as it rounds the curve? 25.0 m W S 1.25 x 105 N 9.80 x 104 N 5.00 X 103 N 1.00 x 103 NQuestion 7 (1 point) A point mass moves through a circular are of length L and radius r in time t. What is the angular velocity about the centre of the circle? Or/Lt 271/LL 2nr/t Question 8 (1 point) A bucket of water is swung in a vertical circle at arm's length of 0.70 m. The minimum number of revolutions per second it must be swung to keep the water from spilling out of the bucket is 3.74 2.62 1.68 0.60Question 9 (1 point) A particle travels in uniform circular motion. Which of the following correctly describes the linear velocity, angular velocity and linear acceleration of the particle? Linear velocity Angular velocity Linear acceleration 1 varying constant varying 2 varying constant constant 3 constant varying zero 4 constant constant zero O1 2 4Question 10 (1 point) A ball of mass 0.10 kg is attached to a string and swung in a vertical circle of radius 0.50 m as shown below. At the top of the circle, the tension in the string is 6.2 N. 0.50 mi What is the speed v of the ball at this instant? 5.1 m/S 6.0 m/s 36 m/s 72 m/sQuestion 11 (1 point) An aircraft is moving in a horizontal plane at a constant speed. It banks at an angle of 50 to the vertical in order to make a turn as shown in the diagram below. The only forces acting on the aircraft are lift, Land weight. W. What is the ration of R? 50 W 0.643 0.766 0.839 1.19Question 12 (1 point) Two objects A and B of the same mass are fixed on a horizontal circular rotating platform. Object A is at a distance (1/2)r from the centre of the platform while object B is at the rim of the platform, where r is the radius of the platform. What is the ratio net force on A: net force on B? 1:2 D 2:1 D 14 4:1Question 13 (1 point) Cygnus X- 1 is orbiting the massive star HDE226868, with a period of 5.6 days. What can you infer from this? The mass of HDE226868. The mass of Cygnus X-1 Nothing. (You need more information, such as the size of the orbit, to determine the mass.) The mass of the binary system. Question 14 (1 point) The derived unit for the universal gravitational constant, G, is N m/kg N kg/m ON m 2/kg? ON K8 2 /m 2Question 15 (1 point) At the surface of Earth, an astronaut has a gravitational mass of 80 kg at a location where the acceleration due to gravity is 10 m/s2. What is the force of gravity on the astronaut at a location one Earth radius above Earth's surface? 40 N [toward the centre of Earth] 200 N [toward the centre of Earth] 400 N [toward the centre of Earth] 800 N [toward the centre of Earth] Question 16 (1 point) A 1.5 x 10 5 kg mass is attracted by a 1.2 x 1014 kg mass at a distance of 1.3 x 109 What is the gravitational force of attraction between the two masses? 1.4 x 1023 N 1.1 x 1017 N 92 x 1012 N 7.1 x 106 NQuestion 17 (1 point) In a Cavendish experiment, the force of attraction between two spheres is 6.25 x 10" N at a separation distance of 1.60 x 10 1 If the mass of one of the spheres is 5.0 kg what is the mass of the other sphere? 0.48 kg 2.4 kg 3.0 kg 19 ke Question 18 (1 point) The mass of Mercury is 3.2 x 1023 kg and its radius is 2.43 x 106. What is the value of g on this planet? 3.6 m/s2 7.6 m/s 2 8.8 x 10 m/s2 1.3 x 1017 m/s2Question 19 (1 point) A satellite has a mass m and a weight F. in a lab on the surface of Earth, It is placed in a rocket and sent to a distance of two Earth radii above the surface of Earth. As it travels from Earth to this new location, which of the following is correct? The mass of the satellite decreases and the weight remains constant. The mass of the satellite remains constant and its weight decreases. Both the mass of the satellite and its weight remain constant. Both the mass of the satellite and its weight decrease.Question 20 (1 point) Which of the following equations can be used to calculate the magnitude of the gravitational field strength, g, on the surface of a celestial body in terms its mass, M. radius, r, and the universal gravitation constant, G? GM O GM GMQuestion 21 (3 points) When comparing mass and size data for the planets Earth and Jupiter, it is observed that Jupiter is about 300 times more massive than Earth. One might quickly conclude that an object on the surface of Jupiter would weigh 300 times more than on the surface of the Earth. For instance, one might expect a person who weighs 500 N on Earth would weigh 150000 N on the surface of Jupiter. Yet this is not the case, In fact, a 500-N person on Earth weighs about 1500 N on the surface of Jupiter. Explain how this can be. [Click on [... ] in your answer box to use more math tools] Paragraph BIU A HEMIEM + Question 22 (2 points) If the gravitational force exerted by the Moon on an astronaut landed on the Moon is 113.6 N, what is the mass of the astronaut? (MMoon # 7.3483 x 1022 kg, RMoon = 1.7374 x 10 m)