Physics Unit 2 - 2D Projectile Motion

Which does NOT involve acceleration?

• Coming to a stop
• Moving at a constant speed in a circle
• Moving at a constant speed in a straight line
• Speeding up from rest

When velocity is positive and acceleration is positive, what happens to the object's motion?

• The object slows down.
• The object speeds up.
• The object remains at rest.
• Nothing happens to the object.

Tags

NGSS.HS-PS2-1

Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt?

• Feather
• Metal Bolt
• They would hit the ground at the same time.
• They would be suspended in the vacuum.

Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.

• Vector, scalar, scalar
• 
  Scalar, vector, scalar

• Scalar, scalar, vector
• Vector, scalar, vector

What is the path of a projectile?

• Wavy line
• Hyperbola
• Parabola
• Projectiles do not follow a predictable path

What is true about the vertical motion of a projectile?

• It accelerates downward at 9.81 m/s²
• It accelerates upward at 9.81 m/s²
• It moves at a constant vertical velocity
• It cannot be determined

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What is true about the horizontal motion of a projectile?

• It accelerates backwards at 9.81 m/s²
• It accelerates forward at 9.81 m/s²
• It moves at a constant horizontal velocity
• It cannot be determined

A passenger on a bus moving east sees a man standing on a curb. How does the man appear to move according to the perspective of the passenger?

• Stand still
• Move west with a speed less than the bus's speed
• Move west with a speed equal to the bus's speed
• Move east with a speed equal to the bus's speed

A small airplane flies at a velocity of 145 km/h toward the south as observed by a person on the ground. The airplane pilot measures an air velocity of 170 km/h to the north. What is the velocity of the wind that affects the plane relative to the ground?

• 25 km/h; S
• 25 km/h; N
• 315 km/h; S
• 315 km/h; N

Which of the following is an example of projectile motion?

• A jet lifting off a runway
• A baseball thrown through the air
• A space shuttle taking off
• A train moving along a flat track

Tags

NGSS.MS-PS2-4