Physical Science Review leah is awesome and so is tamara fav students ever and brendan too

100 1. Speed with direction is called ________.

Answer 1. Speed with direction is called ________. Velocity

300 2. 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?

Answer 2. 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

300 How are the variables speed and velocity different?

Answer How are the variables speed and velocity different? Velocity can be negative, it is speed with direction.

200 Write a + or - next to the directions which are positive and negative respectively. a. up b. left c. east

Answer Write a + or - next to the directions which are positive and negative respectively. a. up b. left c. east + -

100 This is the rate at which velocity changes

Answer This is the rate at which velocity changes acceleration

300 This is the value of the acceleration due to gravity

Answer This is the value of the acceleration due to gravity 9.8 m/s2

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

Answer Why 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.

200 If 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?

Answer If 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.

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

Answer You know time and speed. What is the equation for finding distance? d = t * v Other ways to write this equation: t = d/v v = d/t You need to know how to use all 3 for the test.

100 What is the equation for finding acceleration?

Answer What is the equation for finding acceleration? acceleration = (vfinal - vinitial)/time Also know how to find slope of a line. slope = (Y2 - Y1)/(X2 - X1)

300 A 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?

Answer A 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

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

Answer It takes a garbage truck 10 seconds to go from 0 to 25 m/s. What is its acceleration? 2.5 m/s2

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

Answer During what time is the object moving at a constant speed? 10-15 seconds

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

Answer What is the object’s acceleration from 15 to 40 seconds? -4 m/min2

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

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

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

Answer If 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.

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

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