Exam 2: Motion in One Dimension

A ball is thrown straight upward from ground level with a speed of $18 \mathrm {~m} / \mathrm { s }$ How much time passes before the ball strikes the ground if we disregard air resistance?

To determine the height of a flagpole, Abby throws a ball straight up and times it. She sees that the ball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a total elapsed time of 4.1 s. How high is the pole above the point where the ball was launched? Neglect air resistance.

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?

If, in the figure, you start from the Bakery, travel to the Cafe, and then to the Art Gallery in 2.00 hours, what is your (a)average speed? (b)average velocity?

A car starting from rest accelerates at a constant 2.0 m/s² for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s². How far does it travel after starting?

A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance?

From the edge of a roof top you toss a green ball upwards with initial speed v₀ and a blue ball downwards with the same initial speed. Air resistance is negligible. When they reach the ground below

The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 8.0 s?

An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s². It travels a distance of 1.033 km while accelerating. (a)How fast is the auto moving just as it is traveled the 1.033 km? (b)How many seconds did it take to travel the 1.033 km?

A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with constant acceleration. The car comes to a stop in a distance of 120 m. How fast was the car moving when it was 60.0 m past the point where the brakes were applied?

A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Take the acceleration due to gravity to have magnitude $9.80 \mathrm {~m} / \mathrm { s } ^ { 2 }$ and neglect any effects of air resistance. With what speed was the rock thrown?

Acceleration is sometimes expressed in multiples of g, where $g = 9.8 \mathrm {~m} / \mathrm { s } ^ { 2 }$ is the acceleration of an object due to the earth's gravity. In a car crash, the car's forward velocity may go from $29 \mathrm {~m} / \mathrm { s }$ to $0 \mathrm {~m} / \mathrm { s }$ in $0.15 \mathrm {~s}$ How many g's are experienced, on average, by the driver?

The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 6.0 s?

A ball is thrown downward in the absence of air resistance. After it has been released, which statement(s)concerning its acceleration is correct? (There could be more than one correct choice.)

Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if braking from 56 mi/h than from 28 mi/h?

An object moves 15.0 m north and then 11.0 m south. Find both the distance it has traveled and the magnitude of its displacement.

Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s. What was the speed of the ball at launch? Neglect air resistance.

A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s² and there is no atmosphere. What is the speed of the hammer after 8.0 s?

A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then 1.0 km north to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

An airplane needs to reach a forward velocity of $203.0 \mathrm {~km} / \mathrm { h }$ to take off. On a $2000 - \mathrm { m }$ runway, what is the minimum uniform acceleration necessary for the plane to take flight if it starts from rest?