Taher-Physics - Motion 1

Which statement about drawing vectors is true?

• The vector’s length should be proportional to

  its magnitude.

• You need a vector diagram to solve all physics problems properly.

• A vector is a quantity that has a magnitude but no direction.

• All quantities in physics are vectors.

The figure below shows a simplified graph of a bicyclist’s motion. When is the person stop?

• 10-15

• 0-10

• 15-40

• 40-55

Tags

NGSS.MS-PS3-1

What is the average velocity of a train moving along a straight track if its displacement is 192 m east during a time period of 8.0 s?

• 12 m/s east

• 24 m/s east

• 48 m/s east

• 96 m/s east

Which statement would be true about the particle model motion diagram for an airplane flying at a con- stant speed of 850 km/h?

• The dots would start close together and get farther apart as the plane moved away from the airport.

• The dots would be far apart at the beginning and get closer together as the plane moved away from the airport

• The dots would form an evenly spaced pattern

• The dots would start close together, get farther apart, and then get close together again as the air- plane traveled away from the airport

A squirrel descends ( goes down) an 8-m tree at a constant speed

in 1.5 min. It remains still at the base of the tree for 2.3 min. A loud noise then causes the squirrel to scamper back up the tree in 0.1 min to the exact position on the branch from which it started. Ignoring speeding up and slowing down motion, which graph most closely represents the squirrel’s vertical displace- ment from the base of the tree?

• 
• 
• 
• 

The figure below shows a simplified graph of a bicyclist’s motion. (Speeding up and slowing down motion is ignored.) When is the person’s velocity greatest?

• section I

• section III

• point D

• point B

A rat is moving along a straight path. Find the rat’s position relative to its starting point if it moves 12.8 cm/s north for 3.10 s.

• 40 m

• 4 m

• 15.9 m

• 9.7 m

Which runner is faster?

• A

• B

• nor A neither B

Tags

NGSS.MS-PS3-1

The position-time graph in shows the motion of four cows walking from the pasture back to the barn.

Rank the cows according to their average velocity, from slowest to fastest.

• Elsie - Bessie- Moolinda - Dolly

• Moolinda - Dolly - Bessie -Elise

• Dolly - Moolinda - Bessise- Elsie

• Bessie - Dolly - Elsie - Moolinda

You ride a bike at a constant speed of 4.0 m/s for 5.0 s. How far do you travel?

write the answer without unit