P9- Motion

Question 1

What does the gradient on a distance-time graph represent?

Answer 1

Speed

Question 2

How does the distance-time graph look for a stationary object?
constant-speed object?

Answer 2

Horizontal line
Straight line that slopes upwards

Question 3

Acceleration

Answer 3

Rate of change of velocity

Question 4

Deceleration

Answer 4

Change of velocity when an object slows down

Question 5

What does the gradient on a velocity-time graph represent?

Answer 5

Acceleration

Question 6

On a velocity-time graph what is a horizontal line?
positive gradient line?
negative gradient line?

Answer 6

Constant velocity
Acceleration
Deceleration

Question 7

What does the area under the line on a velocity-time graph represent?

Answer 7

The distance travelled in a given direction (displacement)

Question 8

How to investigate the effect of acceleration on an object of constant mass?

Answer 8

-Set up a level track
-Attach full weight stack to end of the string (force)
-Switch on datalogger, enter card length and release glider
-Record acceleration, do 3 times, calculate mean
-Repeat experiment with dif masses on end of string, placing mass on car instead
-Mass of car and hanger is constant

Question 9

How to find the gradient of a line on a graph?

Answer 9

Gradient= height of triangle / base of triangle

Question 10

How to find speed on a distance-time graph when not a straight line

Answer 10

-Draw tangent at the point
-Draw triangle from the tangent
-Calculate gradient of triangle

Question 11

Accuracy

Answer 11

Result that is close to the true value

Question 12

Precision

Answer 12

Results that have little spread between the mean value

Question 13

High precision meaning?
High accuracy meaning?

Answer 13

Low range of data
Close to true value

Question 14

An object moving round in a circle
Direction of motion?
Speed?
Velocity?

Answer 14

Changes continuously
Constant
Not constant