Projectile Motion

At what point is v_y= 0 m/s?

• A

• B

• C

• D

• None of these points

In the absence of air resistance, the angle at which a thrown ball will go the farthest is?

• 90°

• 30°

• 60°

• 45°

A ball is thrown into the air at some angle, with initial velocities v_x (horizontal) and v_y (vertical). At the very top of the ball’s path:

What is its velocity in the vertical direction?

• v_y

• Greater than v_y

• Zero

A ball is thrown into the air at some angle, with initial velocities v_x (horizontal) and v_y (vertical). At the very top of the ball’s path:

What is its velocity in the horizontal direction?

• v_x

• Greater than v_x

• Zero

A package is dropped from an airplane, where will the package hit the ground?

• A

• B

• C

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball is thrown vertically into the air. Its height in feet after t seconds is given by the equation h(t) = –5t² + 20t, and is graphed below. How high will the ball be after 3 seconds?

• 20 ft

• 15 ft

• 5 ft

• 10 ft

A ball thrown straight up takes 8 total seconds to complete its journey all the way up and down. 1 second into its journey and 7 seconds into its journey the magnitude of its velocity will be ______________ and its direction _______________.

• opposite, the same

• the same, opposite

• the same, the same

• opposite, opposite

The fact that an apple and a watermelon, dropped simultaneously from the same height, would hit the ground at the same time indicates that

• you don't like apples or watermelons.

• greater masses have greater acceleration.

• lesser masses have greater acceleration.

• acceleration is independent of mass.

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

• less than

• equal to

• greater than

What is true about the vertical velocity of a projectile launched horizontally?

• It is initially at its maximum value.

• It increases due to gravity as it falls.

• It remains constant throughout its trajectory.

• It decreases as it falls due to gravity.