physics concepts

Magnitude only?

Scalar quantity

Magnitude + direction?

Vector quantity

Which type of quantity does not a negative value?

Scalar Quantity

T/F: Scalar quantities can be zero but never negative,

True.

Which type of quantity is always positive?

Scalar quantity

How is weight (which is a vector quantity) computed?

mass x gravitational acceleration

What is the SI unit for weight?

Newton (N)

________ is always downward, perpendicular to Earth.

Weight

Which vector quantity is always in the opposite direction of motion?

Friction

________ is the total length of the path that an object has traveled. On the other hand, ______ is the shortest length with direction.

Distance; Displacement

Displacement is what type of quantity?

Vector quantity

Distance is what type of quantity?

Scalar quantity

Distance vs. Displacement: Which is used to find speed?

Distance

Distance vs. Displacement: Which is used to find velocity?

Displacement

___________ is done by adding arithmetic numbers.

Scalar Addition

________ is done by triangle method/head-to-tail method/parallelogram.

Vector Addition

What is always described in terms of a reference point?

A scalar quantity divided/multiplied by another scalar quantity will always produce a ______ quantity.

Scalar

______ is the absolute value of velocity.

Speed

displacement/time will give you what?

Velocity

distance/time will give you what?

Speed

When a vector quantity is divided/multiplied by a scalar quantity, the resulting quantity will be a ______ quantity.

Vector

A vector quantity that shows the change in velocity over time.

Acceleration

TRUE OR FALSE: Average speed is always the magnitude of average velocity.

False; It is NOT ALWAYS

A vector quantity that shows the change in velocity over time.

Acceleration

What is the unit for acceleration?

m/s²

A vector quantity that describes the velocity at a specific instant.

Instantaneous velocity

In a position-time (x vs t) motion graph, solving for the slope will give what?

Velocity

In a position-time (x vs t) motion graph, solving for the area under the curve will give what?

Nothing

Getting the slope in a velocity-time (v vs t) motion graph will give what?

Acceleration

Getting the area under the curve in a velocity-time (v vs t) motion graph will give what?

Displacement

The slope of from an acceleration-time (a vs t) motion graph is equivalent to?

jerk or jolt/nothing

The area under the curve of from an acceleration-time (a vs t) motion graph is equivalent to?

Velocity

What type of motion is represented by a straight diagonal line on an x vs. t graph?

Motion at constant velocity

What does a zero slope (flat horizontal line) indicate on an x vs. t graph?

Object is at rest (v = 0)

If x decreases in an x vs. t motion graph, what would that mean for the velocity?

negative velocity

If x increases in an x vs. t motion graph, what would that mean for the velocity?

positive velocity

In an x vs. t motion graph, a decrease in velocity is a decrease _________.

distance

In an x vs. t motion graph, a patusok (sharp point) is the point wherein the object ____________.

Changes direction

In a velocity-time (v vs. t) motion graph, increase in velocity means _____ acceleration.

positive

In a velocity-time (v vs. t) motion graph, decrease in velocity means _____ acceleration.

negative

In a velocity-time (v vs. t) motion graph, constant velocity means _____ acceleration.

zero

A toy car moves along a straight horizontal track. At a given instant, its velocity is directed to the left (negative direction) while its acceleration is directed to the right (positive direction). Which of the following describes the motion of the toy car?

A. It is speeding up while moving to the right.

B. It is speeding up while moving to the left.

C. It is slowing down while moving to the left.

D. It is slowing down while moving to the right.

C

Under which of the following conditions is a particle speeding up?

I. Velocity is positive and acceleration is positive.

II. Velocity is negative and acceleration is negative.

III. Velocity is negative and acceleration is positive.

A. I only

B. II only

C. I and II only

D. I, II, and III

C

If velocity is constant, the acceleration is always ______.

Zero

What would this mean for the acceleration—positive or negative?

Negative

What would this mean for the acceleration—positive or negative?

Positive

Slope is related to velocity. A steep slope means ________ velocity.

High

Slope is related to velocity. A shallow slope means ________ velocity.

Less

What does it indicate when an object’s velocity changes from positive to negative, and also crossing the x-axis on a graph?

Change in direction