1.Which of the following objects is accelerating?A ball bouncing down the streetA person sitting on a bike at an intersectionA train moving north at a constant speed of 60 mphA plane flying west at a uniform velocity of 30 m/s

A skier begins the descent down a mountain tilted 24 degrees below the horizontal. The skier starts from rest and travels at a constant acceleration during an 18 m section down the mountain. What is the final speed of the skier in this section in m/s?

12 m/s19 m/s8.5 m/s3.9 m/s

A fish swims 50 m due east, then 150 m northwest (45 north of west). What is the fish's net displacement?

90 m, 62 degrees north of west120 m, 62 degrees north of west158 m, 34 degrees north of west188 m, 34 degrees south of west

An object moves 10 ft north, then 2 ft south. What is its total displacement?

8 ft south12 ft north22 ft north8 ft north

A canoe crossing a river due north can move at 5 m/s relative to the shore. The river has a current flowing south at 2 m/s. What is the canoe's velocity relative to the river?

3 m/s3 m/s5 m/s7 m/s

A basketball is dropped from a roof 20 meters from the ground. How long does it take for the ball to reach the ground?

1.0 seconds4.0 seconds2.0 seconds5.0 seconds

The graph here shows the position of a particle as a function of time as it travels along thex-axis. Position is given in the unit meter, and time is in seconds. https://cdn.flvs.net/assessment_images/educator_apphysics_v23/01_11_pt1_13.jpg What is the particle's average velocity betweent= 0 s andt= 2.0 s?

10 m/s30 m/s0 m/s40 m/s

An airplane lands on a runway. The brakes are applied at a steady rate, and it accelerates from 75 m/s to 0 m/s in 4 seconds. How far does the plane travel during this time interval?

150 m225 m375 m525 m

Which of the following is an example of a vector?

MassVolumeTemperatureVelocity

The graph here shows the position of a particle as a function of time as it travels along the x-axis. Position is given in the unit meter, and time is in seconds. https://cdn.flvs.net/assessment_images/educator_apphysics_v23/01_11_pt1_10_flvs.jpg What is the particle's average velocity betweent= 0.0 s andt= 1.0 s?

5 m/s10 m/s5 m/s0 m/s

The following graph shows the velocity of an object as a function of time. Based on this graph, which of the following statementsmostaccurately describes the object's acceleration? https://cdn.flvs.net/assessment_images/educator_apphysics_v23/01_11_pt1_24.jpg

Acceleration is equal to zero.Acceleration is constant and negative.Acceleration is constant and positive.Acceleration is increasing at various rates.

A dog walks north 1 meter, then walks west 12 meters, then south 1 meter. It takes the dog 4 seconds total to walk this distance. What is the average velocity?

3 m/s east12 m/s east3 m/s west6 m/s west