Two-Dimensional Motion and Vectors

The result of adding two vectors together is called the?

• independent vector
• resultant vector
• directional vector
• manipulated vector

At the instant a ball is thrown horizontally, an identical ball is dropped from the same height. Which ball hits the ground first? (no air resistance)

• the horizontally thrown ball
• they both hit the ground at the same time
• the dropped ball

The diagram represents the path of a car that is driven off a cliff. Neglecting air resistance, the horizontal component of the velocity at A is _______ the horizontal component of the velocity at B

• smaller than
• greater than
• the same as
• can not be determined

Tags

NGSS.HS-PS2-2

According to the picture, which points is the speed of the projectile the same?

• B and E
• A and E
• B and D
• Both A and E, B and D

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

• 60 degrees
• 45 degrees
• 15 degrees
• 30 degrees

The cannon fires at 45 degrees with a set velocity. If the angle of the projectile is raised to 75 degrees, what would happen to the height and range of the projectile's path?

• The projectile would travel to a greater height and have a longer range.
• The projectile would travel to a lower height and have a smaller range.
• The projectile would travel to a greater height and have a smaller range.
• The projectile would travel to a greater height and have the same range.

A ball is thrown straight upward at 20 m/s. With no air resistance, the ball will return to the thrower's hand with a speed of?

• 20 m/s
• 40 m/s
• 80 m/s
• 0 m/s

The picture shows two objects that were dropped and recorded with a stroboscopic camera. The best explanation for the results is that object A

• has less air resistance
• was dropped from a greater height
• has a smaller mass
• accelerated more slowly

Tags

NGSS.HS-PS2-1

Which of the following is a physical quantity that has a magnitude but no direction?

• Vector
• Scalar
• Resultant
• Frame of Reference

Identify the following quantities as scalar or vector: the mass of an object, the number of hairs on a dog, an airplane's velocity.

• Vector, Scalar, Scalar
• Scalar, Scalar, Vector
• Vector, Scalar, Scalar
• Scalar, Vector, Vector