Answer key for Physics Test

Motion and forces in 2D

Q1

• Resultant = sum of all vectors applied

• Equilibriant = vector equal in magnitude to the resultant, but opposite in direction

Q2

• Horizontal velocity = 5.3 m/s away from house

• Vertical velocity = 3.3 m/s down

Q3

Q4

• Systems of equations

• Acceleration = 3.83 m/s2

Q5

• 8.02 m [ S 4 W]

• 8.02 m [W 86 S]

Q6

• Μ = 0.19

Q7

Q8

• Determine Fnet, forces are slowing toboggan

• Find acceleration: -6.4 m/s2

• Use acceleration to find displacement

• D =2.8 m

Q9

• 70 N [N 13 E]

• 70 N [E 77N]

Q 10-11

10) A

11) B