Scalars and vectors
Grade 11 Science Worksheet
Circle the best answer, or write your answer on the line.
A drone flies 120 m north, then 90 m east, taking 50 s in all. What is the size of its average velocity, Ari?
A drone flies 160 m north, then 120 m east, taking 40 s in all. What is the size of its average velocity, Bo?
A drone flies 300 m north, then 400 m east, taking 125 s in all. What is the size of its average velocity, Esme?
A cart rolling east at 3 m/s hits a bumper and rolls west at 2 m/s. The contact lasts 0.5 s. What is its average acceleration, Jun?
- 2 m/s² west
- 10 m/s² east
- 2 m/s² east
- 10 m/s² west
A car turns a corner at a steady 10 m/s, from heading east to heading north. What is the size of its change in velocity, Kira?
- About 14 m/s, pointing northwest
- 0 m/s, since the speed is the same
- 20 m/s, pointing west
- 10 m/s, pointing north
A car moves at a constant 20 m/s round a curve. Which statement is true, Luz?
- It accelerates, because its velocity changes direction
- It accelerates, because its speed keeps changing
- It has no net force on it, since the speed is steady
- It does not accelerate, since its speed is constant
A boat heads east at 4 m/s in still water while a current flows north at 3 m/s. What is the boat's speed relative to the ground, Milo?
- 7 m/s
- 5 m/s
- 3.5 m/s
- 1 m/s
A boat travels 5 m/s in still water and must land directly opposite in a 3 m/s current. At what angle to the straight-across line must it aim upstream, Pia?
- About 31°
- About 37°
- About 53°
- 0°, straight across
A box at rest has a 6 N force east and an 8 N force north on it. A third force keeps it at rest. What is the third force, Ren?
- 10 N, pointing 53° south of west
- 2 N, pointing south
- 10 N, pointing 53° north of east
- 14 N, pointing southwest
Forces of 5 N and 12 N act on a box. Which of these could be the size of the net force, Tala?
- 20 N
- 10 N
- 3 N
- 18 N