Physical Science Review

Physical Science Reviewleah is awesome and so is tamara fav

students ever and brendan too

1001. Speed with direction is called ________.

Answer1. Speed with direction is called ________.

Velocity

3002. Lance Armstrong’s teammate, George Hincapie, averaged a speed of 33.6 km/hr in the 15th stage of the Tour de France, which took 4.00 hours. How far (in kilometers) did he travel?

Answer2. Lance Armstrong’s teammate, George Hincapie, averaged a speed of 33.6 km/hr in the 15th stage of the Tour de France, which took 4.00 hours. How far (in kilometers) did he travel?

134 km

300How are the variables speed and velocity different?

AnswerHow are the variables speed and velocity different?

Velocity can be negative, it is speed with direction.

200Write a + or - next to the directions which are positive and negative respectively.

a. upb. leftc. east

AnswerWrite a + or - next to the directions which are positive and negative respectively.

a. upb. leftc. east

+-+

100This is the rate at which velocity changes

AnswerThis is the rate at which velocity changes

acceleration

300This is the value of the acceleration due to gravity

AnswerThis is the value of the acceleration due to gravity

9.8 m/s2

300Why is the position vs time graph for an object in freefall a curve?

AnswerWhy is the position vs time graph for an object in freefall a curve?

gravity is acting on the object causing it to accelerate, and objects which are accelerating show up as a curve on a position vs time graph.

200If you walk 8 blocks north from your house and then 3 blocks south how far did you walk? What is your position relative to your house?

AnswerIf you walk 8 blocks north from your house and then 3 blocks south how far did you walk? What is your position relative to your house?

you walked 11 blocks, you are 5 blocks north of your house.

200You know time and speed. What is the equation for finding distance?

AnswerYou know time and speed. What is the equation for finding distance?

d = t * vOther ways to write this equation:t = d/vv = d/tYou need to know how to use all 3 for the test.

100What is the equation for finding acceleration?

AnswerWhat is the equation for finding acceleration?

acceleration = (vfinal - vinitial)/time

Also know how to find slope of a line.

slope = (Y2 - Y1)/(X2 - X1)

300A high-speed train travels at 300 km/h. How long (in hours) would it take the train to travel 1,500 km at that speed?

AnswerA high-speed train travels at 300 km/h. How long (in hours) would it take the train to travel 1,500 km at that speed?

5 hours

300It takes a garbage truck 10 seconds to go from 0 to 25 m/s. What is its acceleration?

AnswerIt takes a garbage truck 10 seconds to go from 0 to 25 m/s. What is its acceleration?

2.5 m/s2

300During what time is the object moving at a constant speed?

AnswerDuring what time is the object moving at a constant speed?

10-15 seconds

300What is the object’s acceleration from 15 to 40 seconds?

AnswerWhat is the object’s acceleration from 15 to 40 seconds?

-4 m/min2

200A variable that is described using both a number and a direction is called this.

AnswerA variable that is described using both a number and a direction is called this.

vector

200If ramp A is steeper than ramp B what affect will it have on a car traveling down the ramp’s acceleration?

AnswerIf ramp A is steeper than ramp B what affect will it have on a car traveling down the ramp’s acceleration?

the acceleration of the car on the steeper ramp will be greater.

200A snail travels 200 cm in 1 hr calculate the snails speed in cm/hr.

AnswerA snail travels 200 cm in 1 hr calculate the snails speed in cm/hr.

200 cm/hr