Measuring Motion

Question 1

What does a driver with a slow reaction rate do to the stopping distance of a car?

Answer 1

Lengthens the stopping distance

Question 2

What can a ticker timer strip be used to measure?

Answer 2

The speed of an object

Question 3

How is average speed calculated?

Answer 3

Distance travelled divided by time taken

Question 4

How do you convert from km/hr to m/s?

Answer 4

Divide by 3.6

Question 5

How do you convert from m/s to km/hr

Answer 5

Multiply by 3.6

Question 6

What must an object travelling at constant speed do?

Answer 6

Travel the same distance in the same time

Question 7

How is time calculated using distance and average speed?

Answer 7

Distance travelled divided by average speed

Question 8

How is distance calculated?

Answer 8

Average speed multiplied by time

Question 9

What factors may affect the stopping distance for a car?

Answer 9

Reaction time and road surface

Question 10

When does an object contain zero acceleration?

Answer 10

When the object is not moving or is moving at constant speed

Question 11

What is acceleration a measure of and what units is it measured in?

Answer 11

A measure of how much the speed of an object changes every second, measured in metres per second squared

Question 12

What is acceleration?

Answer 12

An increase in speed, also known as positive acceleration

Question 13

What is deceleration?

Answer 13

A decrease in speed, also known as negative acceleration

Question 14

What units are time and velocity measured in?

Answer 14

Seconds and metres per second

Question 15

How do you calculate the change in velocity?

Answer 15

Final velocity minus initial velocity

Question 16

How is acceleration calculated using velocity and time?

Answer 16

Change in velocity divided by time

Question 17

How is time calculated using velocity and acceleration ?

Answer 17

Change in velocity divided by acceleration

Question 18

How is the change in velocity calculated?

Answer 18

Acceleration multiplied by time

Question 19

What is Newton’s second law of motion?

Answer 19

A non-zero net force produces acceleration

Question 20

What are the units of net force, mass and acceleration?

Answer 20

Newtons, kilograms and metres per second squared

Question 21

How is acceleration calculated using net force and mass?

Answer 21

Net force divided by mass

Question 22

How is mass calculated?

Answer 22

Net force divided by acceleration

Question 23

How is net force calculated?

Answer 23

Mass multiplied by acceleration

Question 24

Why does the booster rocket of a space shuttle produce the same constant force all the time, yet its acceleration increases as time goes by?

Answer 24

The net force is constant and the acceleration is increasing, therefore the mass must be decreasing. Mass decreases as fuel is burnt up, thus the acceleration increases

Question 25

What is the decimal value of the time interval between each dot on a ticker-timer tape?

Answer 25

0.02 seconds

Question 26

What occurs to the dots on a ticker timer when the tape accelerates?

Answer 26

The dots are spread further apart from each other

Question 27

What occurs to the dots on a ticker timer when the tape decelerates?

Answer 27

The dots are found in closer proximity to each other

Question 28

What occurs to the dots on a ticker timer when it is travelling at a constant speed?

Answer 28

The dots are evenly spaced apart