Quiz 10 Motion in two Dimensions

A dog searching for a bone walks 5.40 m north, then 9.10 m at an angle 30.0° west of north, and finally 5.8 m east. Find the dog's resultant displacement vector, using analytical techniques. 

• 13.54 m at 84.6° north of east
• 10.17 m at 18. 7° north of east
• 13.34 m at 84.6° north of east
• 3 m at 30° north of east

A cannon shoots a cannon ball off the ground at an angle 67° north of east with an initial velocity of 1400 feet per second. Find the time the cannon hits the ground. 

• 40.27 s
• 90.15 s
• 2 s
• 80.54 s

You and your friend are both standing on a building while both holding a ball. Your friend drops the ball and you throw the ball horizontally. Which ball hits the ground first?

• The dropped ball 
• Both land at the same time
• The thrown ball 
• trick question. Neither ball landed because it was a dream!

Tags

NGSS.HS-PS2-1

A car enters an intersection at 20 m/s West where it collides with a truck heading North. The impact rotates the car 90 degrees and gives the car a speed of 15 m/s North. Determine the average velocity and direction if the car was in contact with the truck for 1.25 s.

• 25 m/s @ 37 deg. North of West
• 25 m/s @ 37 deg. West of North
• 25 m/s @ 37 deg. North of East
• 12 m/s @ 9 deg. South of East

You travel 10 m N, then 20 m E, you wait 20 minutes, then go 40 m S, then 30 m W. You then go 30 m N, and finally you turn and go 10 m E. What's your total displacement and distance?

• Distance: 160 m; Displacement: 10 m
• Distance: 140 cm; Displacement: 0 m
• Distance: 12 m; Displacement: 140 m
• Distance: 140 m; Displacement: 0 m

Which of the following is not a vector?

• 4 m south
• 97 miles per hour northeast
• 14 gallons 
• the guy from despicable me

A boat moves through the water of a rives at 12m/s relative to the water. The river is rushing at 3m/s downstream. How long dose it take the boat to take make a 400m trip going downstream and a 400m back upstream?

• 71s
• 75s
• 44.4s
• the boat dose not ever move

A child chucks a melon strait into the air at 30 m/s. Ignoring air resistance, how long is the melon in flight before it hits the ground. 

• 5.5 sec
• 18 sec
• 7.0 sec
• 6.1 sec

Vector A has a magnitudde of 30 units. Vector B is perpendicular to vector A and has a magnitude of 40 units. What would the magnitude of resultant vector A + B be?

• 10 units

• 50 units

• 70 units

• zero

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Tags

CCSS.6.RP.A.3B