review

A downed pilot tires a flare from a flare gun. the false has an initial speed of 250 m/s and is fired at an angle of 37 degrees above the horizontal. What is the time it takes the flare to reach its maximum height? 30.72 s 15.36 s 24.36 s 61.34 s

15.36 s

The object has a constant velocity at time: A. 0-2 seconds B. 2-6 seconds C. 6-8 seconds D. the car is never moving at a constant velocity

2-6 seconds

the speedometer in a car does NOT measure the car's velocity because velocity is a A. vector quantity and speed is not a vector B. vector quantity and does not have a direction associated with it C. scalar quantity and has a direction associated with it D. scalar quantity and does not have a direction associated with it

A. vector quantity and speed is not a vector

during which interval does the student accelerate? AB BC CD DE

AB

Which position time graph describes a train that leaves the station at a constant, slow speed, stops, and then returns to the station at a faster speed?

B- distance v time graph

Which best describes the path of a projectile? A. A wavy line B. A parabola C. A hyperbola D. Silly rabbit, projectiles do not follow a predictable path!

B. A parabola

Which of the following is an example of projectile motion? A. jet lifting off a runway B. a baseball being thrown C. dropping an aluminum can straight down into the recycling bin D. a space shuttle leaving earth

B. a baseball being thrown, football being kicked

When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion? A. the car slows down B. the car speeds up C. the car travels at a constant speed D. the car remains at rest

B. the car speeds up

during which interval is the student forward at a constant speed? AB BC CD DE

BC

The object is increasing it's velocity at time: A. 0-2 seconds B. 2-6 seconds C. 6-8 seconds D. Both 0-2 seconds and 6-8 seconds

Both 0-2 s and 6-8 s

Which of the following does NOT exhibit parabolic motion? A. A frog jumping from land to water B. A basketball thrown to a hoop C. A flat piece of paper released from a window D. A baseball thrown to home plate

C. A flat piece of paper released from a window

Which of the following is the best coordinate system to analyze an object thrown into the air? A. X-axis: perpendicular to the ground and y-axis: up and down B. X-axis: perpendicular to the ground and y-axis: parallel to ground C. X-axis: left and right and y-axis perpendicular to the ground D. X-axis parallel to the ground and y-axis left and right

C. X-axis: left and right and y-axis perpendicular to the ground

Which of the following is a coordinate system for specifying the precise location of objects in space? A. x-axis by itself B. y-axis by itself C. frame of reference D. diagram

C. frame of reference

The slope of a line drawn tangent to a point on the curve of a position vs time graph describes what concept? A. acceleration B. displacement C. instantaneous velocity D. position

C. instantaneous velocity

The SI base unit used to measure mass A. meter B. second C. kilogram D. liter

C. kilogram

What is the SI unite for acceleration is A. m/s B. m^2/s C. m/s^2 D. m*s^2

C. m/s^2

The length of a velocity vector represents the A. cause of velocity B. direction of velocity C. magnitude of velocity D. type of velocity

C. magnitude of velocity

during which interval does the student stop? AB BC CD DE

CD

The SI base unit for time is A. 1 day B. 1 hour C. 1 minute D. 1 second

D. 1 second

A dirt bike starts from rest and accelerated to a speed of 35 m/s in a time of 7 s. What is the motorcycle's average acceleration? A. 215 m/s^2 B. 100 m/s^2 C. 40 m/s^2 D. 5 m/s^2

D. 5 m/s^2

Which of the following situations represents a negative displacement? (assume positive position is measured vertically upward along a y axis) A. a cat stands on a tree limb B. a cat jumps from the ground onto a tree limb C. a cat jumps from a lower tree limb to a higher one D. a cat jumps from a tree limb to the ground

D. a cat jumps from a tree limb to the ground

Acceleration is defined as A. rate of displacement B. rate of change of displacement C. the change in velocity D. the rate of change of velocity

D. the rate of change of velocity

Delete

Delete

Delete 2

Delete 2

A cheetah accelerated from rest to 25 m/s in 6.2 s. Assuming constant acceleration, how far has the cheetah run in this time? A. 4.03 m B. 12.5 m C. 77.5 m D. 0.25 m

Find average velocity, then find displacement. 77.5m

Multiplying or dividing vectors by scalars result in A. vectors B. Scalars C. Vectors if multiplied, or scalars if divided D. Scalars if multiplied, or vectors if divided

a. vectors

A car is traveling at 20.0 m/s when the driver applies the brakes. If the car slows down uniformly with an acceleration of -4.20 m/s^2, about how far does the car travel before coming to rest? 117 m 48 m 31 m 163 m

about 48 m

As a train accelerates away from a station, it reaches a speed of 5.2 m/s in 5.0 s. If the train's acceleration remains constant, what is its speed after an additional 6.0 s has elapsed?

first find acceleration = velocity/time. final velocity is initial velocity plus acceleration times time. 11.44 m/s

which graph best represents the motion of an object whose velocity is positive and constant?

graph 1

which graph best represents the motion of an object whose velocity is constant decreasing?

graph 2

which graph best represents the motion of an object whose velocity is increasing?

graph 3

which graph best represents the motion of an object whose velocity is decreasing?

graph 4 with the four charts

Which of the following is NOT an example of projectile motion? A. A volleyball served over a net B. A baseball hit by a bat C. A hot-air ballon drifting toward Earth D. A long-jumper in action

hot air balloon drifting toward earth is not a projectile

According to the graph, the motion of the object is best described as: A. moving at a constant rate B. moving away from where it started and then returning C. always moving away from where it started D. moving at a constant acceleration

moves away from where it started and then returns

In the graph, a toy car rolls from +3m to +5m. Which of the following statements is true?

position graph (straight line) Change in position +2 m

Which of the following is NOT a vector? A. speed B. acceleration C. displacement D. velocity

speed is not a vector, duh

Which of the following is an example of a vector quantity? A. velocity B. temperature C. volume D. mass

velocity, acceleration, displacement