Exam 2: Newtons Laws

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​Match each item with the correct statement below.​ -the force of air resistance leads to this

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How was the value of G first determined?

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Planetary orbits are

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A body is oscillating up and down at the end of a spring. Let’s consider when the body is at the top of its up-and-down motion. -The velocity

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A body on the surface of the Earth weighs 400 lb.The radius of the Earth is about 4,000 miles.If this same body were placed on a 4,000-mile-high tower,its weight would be

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You whirl a 2-kg body attached to a 1 meter cord around your head in a nearly horizontal circle with a speed of 4 m/s.The tension in the cord is _________.

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As a projectile moves its speed stays constant while its direction changes.

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You throw a ball straight up,it peaks out and then comes back down to you.During this motion,the velocity and acceleration always point in the same direction.

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As a space shuttle is launched into orbit,the direction of its acceleration

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As a body falls through air starting from rest,its acceleration

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Planetary orbits are circles.

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Match each item with the correct statement below.​ -An astronaut is being launched into space,the astronaut's mass

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The weight of an object equals its mass times the acceleration of gravity.

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A 160 lb person has a mass of 160/32 = 5 slugs.A 160-lb person steps into an elevator and stands on a bathroom scale.Determine the scale reading for the given scenarios. -After moving downwards at constant speed,the elevator is slowing down at 2 m/s2 as it is coming to rest.

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The shapes of planetary orbits are __________.

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The symbol G is used to represent

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You are presently exerting a gravitational force on the Earth.

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Match each item with the correct statement below.​ -motion in a straight line with increasing speed

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You roll a ball off a table and at the same time drop a second ball straight down from the edge of table.The second ball reaches the ground ____________ the first ball reaches the ground.

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​Match each item with the correct statement below.​ -the gravitational pull of the Earth on the Moon

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