AnswersHSPHY Physics Sem 1 26-27Vectors

Vectors — Unit test Answers

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Motion maps for two objects, Y and Z, are shown.At which time does Object Y pass Object Z?

Question illustration
A
2
B
3
C
4
D
5
2
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Which graph shows an object with constant acceleration?

A
Option
Option A
B
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 10, and velocity in meters per second on the y axis, numbered 0 to 50. A line starts at the origin and goes to (4, 40), then a line from (4, 40) to (9, 40) and a line from (9, 40) to (10, 0).
Option B
C
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, and velocity in meters per second on the y axis, numbered 0 to 10. A line starts at (0, 10) and ends at (5, 0).
Option C
D
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 35. A curved line starts at the origin and arcs up to (4.3, 35).
Option D
3

The motion map shows an object’s position and velocity at given times.How can the map be changed so it shows constant acceleration after the object changes direction?

Question illustration
A
by adding vectors that are all the same length and placing them above the current top row of vectors
B
by adding vectors that gradually increase in length and placing them above the current top row of vectors
C
by adding vectors that are all the same length and placing them below the current bottom row of vectors
D
by adding vectors that gradually increase in length and placing them below the current bottom row of vectors
4

speedvelocitypositiondirection

A
speed
B
velocity
C
position
D
direction
5

A car drives 16 miles south and then 12 miles west. What is the magnitude of the car’s displacement?

A
4 miles
B
16 miles
C
20 miles
D
28 miles
6

The diagram shows two vectors that point west and north.

Question illustration
A
10 meters
B
50 meters
C
1200 meters
D
2500 meters
8

Hannah made a chart to describe speed and velocity.

Question illustration
A
Switch the chart headings “Speed” and “Velocity.”
B
Describe the calculation for speed as “dividing distance by time.”
C
In the “Speed” column, change “has magnitude” to “is a displacement.”
D
Change the last row of the “Velocity” column to “does not depend on a reference frame.”
9

The chart shows data for an object moving at a constant acceleration.

Question illustration
A
X: 0Y: 0Z: 1
B
X: 2Y: 4Z: 6
C
X: 3Y: 3Z: 3
D
X: 1Y: 5Z: 8
10

The diagram shows a position-time graph.

Question illustration
A
–2 m
B
–1 m
C
3 m
D
4 m
11

Jin walked 4 km on a straight path to get to the sandwich shop. He traveled 30° south of east.

A
-3.5 km
B
-2 km
C
2 km
D
3.5 km
12

A boat travels in a straight path that is 25° west of north. Which describes the values of the west and north components of the boat’s displacement?

A
Both components are positive numbers.
B
Both components are negative numbers.
C
The west component is a negative number, and the north component is a positive number.
D
The west component is a positive number, and the north component is a negative number.

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