CBA #2 Review

Which formula represents the final velocity of an object with average acceleration?

• v_f = v_i * aΔt

• v_i = v_f - aΔt

• v_i = v_f / aΔt

• v_f = v_i + aΔt

Tags

NGSS.HS-PS2-1

In the picture is a diagram of a car traveling in a uniform circular motion along a race track. What point is the centripetal acceleration downward?

• Point A
• Point C
• Point D
• Point B

Tags

NGSS.HS-PS2-1

If air resistance is negligible, which object, a bowling ball or a feather, will hit the ground first if dropped at the same time?

• Both will hit the ground at the same time

• The bowling ball

• they will not fall without air resistance

• the feather

Tags

NGSS.HS-PS2-4

Select 3 of the options below.

Free-fall Acceleration near Earth's surface:

• is nearly constant for all objects

• is different for each object

• has magnitude of 9.8 m/s²

• is always downward

Tags

NGSS.MS-PS2-4

A ball is thrown horizontally at 10 m/s from the top of a cliff 50 m high. How far from the cliff would the ball hit the ground?

• 31.9 m
• 22.6 m

• 102 m

• 3.19 m

Tags

NGSS.HS-PS2-4

A force that acts on an object by touching it.

Word Bank: net force, contact force, field force, normal force

The vector sum of two or more forces acting on an object.

Word Bank: net force, contact force, field force, normal force

Tags

NGSS.HS-PS2-1

A perpendicular contact force exerted by a surface on another object.

Word Bank: net force, contact force, field force, normal force

A force that acts on an object by means of a field.

Word Bank: net force, contact force, field force, normal force

Tags

NGSS.HS-PS2-4

NGSS.HS-PS2-5

The diagram shows the trajectories of two balls. The launch angle for ball A:

• cannot be compared with launch angle for ball B using only the information given

• Is less than the launch angle for ball B

• Is greater than the launch angle for ball B

• is equal to the launch angle for ball B