Exam 2: Motion in One Dimension

A sandbag is released from a rising air balloon and hits the ground 7 seconds later. From what height was the sandbag dropped from if at the moment of release the balloon was traveling upward at 3 m/s.

A river 1.00 mile wide flows with a constant speed of 1.00 mi/h. A woman leaves from a point on the river bank. The woman rows a boat 1.00 mi directly upstream and returns to the starting point. Her speed in still water is 2.00 mi/h. The travel time for the woman is

An object is at x = -3 m and has a velocity of - 4 m/s. It is observed to be slowing down. Its acceleration is

A car accelerates uniformly from a velocity of 10 km/h to 30 km/h in one minute. Which graph best describes the motion of the car?

For uniformly accelerated motion, which of the following quantities must be zero?

If the speed of particle A is twice that of particle B, the distance particle B travels in a given interval of time as compared with particle A is

The acceleration of a vehicle is given by a(t) = At where A is a constant. Its displacement as a function of time is (v_o and x_o are constants)

A particle moves from x₁ = 30 cm to x₂ = - 40 cm. The displacement of this particle is

An object is dropped from rest near the surface of Earth. If the time interval during which it falls is cut in half, the distance it falls will

A vehicle is traveling in the -x direction to x = 100 m. It then reverses direction. At the instant when it changes direction, the acceleration of the vehicle is

An object moves along the x axis as shown in the diagram. At which point or points is the magnitude of its velocity a minimum?

Use the following to answer question : -In which graph of v versus t does the particle end up farthest from its starting point?

A ball has been thrown vertically upward. The graph shows the ball's position as a function of time. Which one of the following statements best describes the motion of the ball?

An object moves along the x axis as shown in the diagram. At which point or points is the object instantaneously at rest?

A particle moves from x₀ = 30 cm to x = -40 cm in 5 s. The average velocity of the particle during this time interval is

A racecar starts from rest and accelerates at a constant rate and reaches a speed of 160 km/h (100 mph) in 6.0 seconds. It continues at this speed for another 5 seconds. What is the car's average speed during the first 11 seconds?

If an object is moving at uniform speed in a straight line, its instantaneous velocity halfway through any time interval is

A ball is thrown upward from an 80-ft tower with an initial vertical speed of 40 ft/s. If air resistance is ignored, the ball's speed when it reaches the ground will be

An object is thrown upward with a velocity of 32 ft/s from a stationary balloon which is 48 ft above the ground. If air resistance is ignored, the total time until the object impacts the ground is

-For this problem, refer to the figure in problem 31. Which interval has the highest magnitude in acceleration?