Kinematics Test WCTA

Speed is

• measure of how fast something is moving.

• always measured in terms of a unit of distance divided by a unit of time.

• the distance covered per unit time.

• all of the options.

Tags

NGSS.HS-PS4-1

Acceleration is defined as the CHANGE in

• time it takes to move from one place to another place.

• time it takes to move from one speed to another speed.

• distance divided by the time interval.

• velocity divided by the time interval.

Tags

NGSS.HS-PS2-1

In the absence of air resistance, objects fall at constant

• speed.

• velocity.

• acceleration.

• distances each successive second.

• all of the above

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball at the halfway mark on it's way back down would be

• less than the speed it had when thrown upwards.

• more than the speed it had when thrown upwards.

• the same as the speed it had when thrown upwards.

Tags

NGSS.HS-PS2-1

Suppose an object is in free fall. Each second the object falls

• the same distance as in the second before.

• a larger distance than in the second before.

• with the same instantaneous speed.

• with the same average speed.

• none of the above

Tags

NGSS.HS-PS2-1

A ball is thrown straight up. At the top of its path its velocity is

• 0 m/s^2.

• 9.8 m/s^2.

• -9.8 m/s^2.

• 4.9 m/s^2.

• -4.9 m/s^2.

Which of the following situations represents a positive displacement? (Assume positive position is measured vertically upward along a y-axis.)

• A cat stands on a tree limb.

• A cat jumps from the ground onto a tree limb.

• A cat jumps from a higher tree limb to a lower one.

• A cat jumps from a tree limb to the ground.

In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true?

• x_f = +3 m

• Delta x = +3 m

• x_i = +3 m

• v_avg = 3 m/s

Suppose you are given a velocity versus time graph. The slope of this graph describes what quantity?

• acceleration

• displacement

• velocity

• position

According to the graph above, during which interval is the object moving with a constant velocity.

• 0.0–5.0 s

• 5.0–10.0 s

• 10.0–15.0 s

• 15.0–20.0 s

Tags

NGSS.MS-PS3-1