Chapter 2 Review Mr. Hauser

Rules of the Game Working in TEAMS, you will be asked to answer questions from the assigned chapters. You have 30 seconds to write the answer down on the dry erase board. When the teacher says TIME’S UP, a team leader will stand up and show the teacher their answer.

Rules (Continued) Each correct answer is worth one point, unless otherwise stated. Teams can lose points for inappropriate conduct, comments, or cheating. The team with the most points at the end of the game wins!

Question 1 One second after starting from rest, a freely falling object will have a speed of about…

9.8 m/s

Question 2 What are the metric units used to measure acceleration?

m/s 2

Question 3 Velocity is a vector quantity because it has both … A. action and reaction counterparts. B. magnitude and direction. C. mass and acceleration.

B. Magnitude and direction.

Question 4 The formula for velocity is v = __________. A.Change in position / Change in acceleration B.Change in velocity / Change in time C.Change in time / Change in position D.Change in position / Change in time

D. Change in position/change in time

Question 5 Ten seconds after starting from rest, a freely falling object will have a speed of about …

98 m/s

Question 6 True or false An object can have a constant speed and still be accelerating.

True

Question 7 When an object falling through the atmosphere can no longer accelerate because the drag force of air resistance is the same magnitude as the weight of the object, this is called…

Terminal velocity

Question 8 Velocity can be found by calculating the slope of a _________ vs. time graph.

Position or displacement

Question 9 An object that is accelerating can be speeding up, slowing down or ___________________.

Changing direction

Question 10 The Greek symbol “  ” means…

Change in

Question 11 The difference between speed and velocity is that speed does not account for ___________.

direction

Question 12 If you travel 3000 miles to San Diego, California, then travel 1,200 miles to Seatle Washington, and then another 2,700 miles back to where you started, what is your displacement?

Zero miles (you ended where you started)

Question 13 The average speed of a car that goes 40 km in 20 minutes is … A. 0.5 km per minute B. 20 mph C. 800 km per minute D. 2 km per minute

Question 14 How far will a plane travel moving at 600 mph in 30 minutes?

300 miles

Question 15 Your car covers a distance of 22.5 km in 10.6 min. Find its velocity in m/s.

35.4 m/s

Question 16 How long will it take to travel from 3.6 miles west of the school to 6.7 miles east of the school traveling at a rate of 0.75 miles/min?

13.72 minutes

Question 17 Find the acceleration of a boat that slows from 15 m/s to 3.2 m/s in a time of 180 seconds

-0.066m/s 2

Question 18 How long until a 45 pound weight that is dropped from rest at a height of 52 meters hits the ground?

3.26 Seconds

Question 19 The slope of a position vs. time graph will give you a ________ shape if the object is accelerating.

parabolic

Question 20 Speed measures the rate of movement while _______ measures the rate of movement and its direction.

Velocity

Question 21 An object that has a negative initial velocity and a negative acceleration is… A. at rest B. speeding up C. slowing down D. at a constant speed E. none of these

B. Speeding up

Question 22 If you toss a ball to yourself in the air at 7.0 m/s, at what velocity do you catch it?

-7.0 m/s

Question 23 True or False An object can have a constant velocity and still be accelerating

false

Question 24 True or False As a ball falls freely, the distance it falls each second is the same

false

FINAL QUESTION A rocket is launched into the air. It has a hang time of 8.5 seconds (that is the time for the entire flight). When it lands, what is its velocity?

-41.6 m/s