AP Physics Projectile Motion

Consider a ball thrown up from the surface of the earth into the air at an angle of 30⁰ above the horizontal. Air friction is negligible. Just after the ball is released, its acceleration is:

• Upwards at 9.8 m/s2

• Upwards at 4.9 m/s2

• Downwards at 9.8 m/s2

• 0 m/s2

• None of the above

Tags

NGSS.HS-PS2-1

In a lab experiment, a ball is rolled down a ramp so that it leaves the edge of the table with a horizontal velocity v. If the table has a height h above the ground, how far away from the edge of the table, a distance x, does the ball land? You may neglect air friction in this problem.

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Tags

NGSS.HS-PS2-1

A rock is thrown into the air at an angle relative to the vertical, and follows the path shown here. Consider air friction to be negligible. What is the direction of the net acceleration of the rock at point D?

• to the left

• to the right

• straight up

• straight down

• there is no net acceleration at point D

Tags

NGSS.HS-PS2-1

A projectile is fired horizontally from a height of 20 m above the ground, with an initial velocity of 7.0 m/s. How far does the projectile travel horizontally before it reaches the ground?

• 7m

• 14m

• 140m

• 3.5m

• 20m

Four students went out for pizza to celebrate after acing their physics final. All of them went directly from their high school to the nearby pizzeria, but they returned along the paths shown, taking different times. Values for the roundtrip distances they traveled and the total times they took to walk their routes are given in the figures. Rank the magnitudes of the average velocities of the students’ trips and explain your reasoning.

• C > B > A > D

• C > B > D > A

• A > C > B > D

• All zero

• Cannot determine

A ball is thrown into the air at an angle Ө as measured from the horizontal with a velocity v. The horizontal velocity of the ball will be directly proportional to which of the following:

• The angle Ө

• The sine of the angle Ө

• The cosine of the angle Ө

• The tangent of the angle Ө

• The value of the gravitational acceleration

Two balls, identical except for color, are projected horizontally from the roof of a tall building at the same instant. The initial speed of the red ball is twice the initial speed of the blue ball.

Which ball hits the ground first?

• The red ball

• The blue ball

• Both hit the ground at the same time

• The answer cannot be calculated

Two balls, identical except for color, are projected horizontally from the roof of a tall building at the same instant. The initial speed of the red ball is twice the initial speed of the blue ball.

Which ball has a larger speed upon hitting the ground?

• The red ball

• The blue red

• Both hit the ground at the same time

• The answer cannot be calculated

Tags

NGSS.HS-PS2-1

Two arrows are launched at the same time with the same speed. Arrow A at an angle greater than 45 degrees, and arrow B at an angle less than 45 degrees. Both land at the same spot on the ground. Which arrow arrives first?

• Arrow A arrives first

• Arrow B arrives first

• They both arrive together

• It depends on the elevation where the arrows are launched

• It depends on the elevation where the arrows land

A diver initially moving horizontally with speed V dives off the edge of a vertical

cliff and lands in the water a distance d from the base of the cliff. How far from the base

of the cliff would the diver have landed if the diver initially had been moving

horizontally with speed 2V?

• d

• 2d

• d square root of 2

• 4d

• It cannot be determined unless you know the height of the hill