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## Which of the following describes motion?

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**Which of the following describes motion?**• A change in mass over time • A change in position over mass • A change in distance over time • A change in mass over distance**How do you know that the car is in motion?**A. The distance between the building and car changes. B. The time it takes the car to move is constant. C. The distance between the building and the car stays constant.**What is the SI or metric unit for distance?**• Miles • Grams • Meter • Feet**What is used for comparison to tell if an object is in**motion? • direction • reference point • Speed • velocity**What is the formula needed to calculate speed of an object?**• distance x time • distance / time • time / distance • acceleration x time • I need help!**Joe Shmoe walks 30 meters in 10 seconds. What was his**speed? • 5 meters/second • 3 seconds/meter • 3 meters/second • I need help!**What is the only difference between speed and velocity?**• Speed is more complex while velocity is less complex. • Velocity is time divided by distance and speed is distance divided by time. • Velocity requires a direction while speed does not. • Speed and velocity are calculated differently. • I need help!**Which of the following is an acceptable unit for velocity?**• Meters per second • Feet per hour • Miles per hour South • Miles per hour • I need help!**You are asked to create a graph that shows the speed of an**object. What should be plotted on the x and y axes? • Y axis = speed; X axis = time • Y axis = time; X axis = distance • Y axis = distance; X axis = time • Y axis = time; X axis = acceleration**What is this graph showing?**• A person walking at varying speeds. • A person walking at a constant speed and then stopping to rest. • A person standing still. • A person walked three miles.**What does this graph show?**• The object is not moving. • The object is moving at a constant speed. • The object is moving at a constant speed then stopped to rest. • The object is moving at varying speeds.**What does a steep slope of a line on a distance time graph**indicate? • Speed is fast • Speed is slow • The object is not moving • Speed is changing**Which of the following is NOT an example of acceleration?**• Walking in a straight line at a constant speed • Approaching a stop sign • A ball rolling down a hill • Turning around a corner at a constant speed**Which of the following best describes a decrease in speed?**• Positive Acceleration • Negative Acceleration • Constant velocity • Average speed**Suzie is running around a track at a constant speed of 5**m/s. Why is she accelerating? • She is running at a constant speed • She is changing direction • She is speeding up • She is slowing down**What is plotted on the y-axis when graphing acceleration?**• Speed • Time • Distance • Acceleration**Force is measured in units of…**• m/s • Newtons • m/s2 • grams**40 N**30 N What is the net force? • 10 N to the left • 10 N to the right • 0 N • 10 N**40 N**40 N What is the Net Force? • 10 N to the left • 10 N to the right • 0 N • 10 N**Which of the following arrows represents the force of**friction? D • A • B • C • D B C A**Which one of the following forces opposes motion?**• gravity • friction • applied force • centripetal force**Why does the Earth have more gravity than the moon?**• The moon revolves faster than the Earth • The moon has less mass than the Earth • Earth is a greater distance from the sun. • The Earth has more water on it. • I don’t know – I need help!**Ignoring air resistance, what object will hit the ground**first when each is dropped from the same height? • Baseball • Bowling ball • Both will hit at same time • I don’t know- I need help!**Which statement best describes gravity?**• Gravity pushes objects towards Earth • Gravity acts on all objects unless they are moving • Gravity pulls objects towards Earth • Gravity acts the same way on Earth as on the moon • I don’t know – I need help!**An object reaches its terminal velocity when…**• the force of gravity is greater • the force of gravity and the force of air resistance are balanced • the force of air resistance is greater • I don’t know – I need help!**The tendency of an object to resist a change in motion is**• Gravity • Friction • Inertia • Momentum • I don’t know – I need help!**The greater the mass of an object…**• the lesser the gravity. • the greater the inertia. • the lesser the force. • the lesser the inertia. • I don’t know – I need help!**Which will have the greatest inertia?**• Bowling ball • Baseball • Tennis Ball • Ping pong ball • I don’t know- I need help!**Your parent presses the car brakes while driving …which of**the following describes your motion? • Your body moves backward • Your body does not move • Your body moves forward • Your body remains at rest • I don’t know – I need help!**Newton’s Second Law states that…**• Objects in motion stay in motion. • Objects at rest stay at rest. • If a net force is applied onto an object, it will accelerate. • For every action there is an equal and opposite reaction. • I don’t know – I need help!**You are having difficulty pulling a pile of books in a**wagon. What would be the best way to increase the acceleration of the wagon? • Remove some books from the wagon. • Add some books to the wagon. • Remove the wheels from the wagon. • Have a friend help you get on an exercise program • I don’t know – I need help!**A person pushes a 10kg shopping cart down the isle. The cart**accelerates at a rate of 2m/s2. How much force did he exert on the cart? • 5 N • 12 N • 20 N • 5 kg • I don’t know – I need help!**40 N**30 N What will happen to this object if the forces are applied? • The object will accelerate to the left. • The object will accelerate to the right. • The object will stay at rest. • The object will not accelerate. • I don’t know – I need help!**Which of the following situations best illustrates**Newton’s Third Law of Motion? • A boy pulling a wagon, which accelerates. • Inflating a balloon and releasing it. • Moving forward when a car stops. • I don’t know – I need help!**Which of the following describes Newton’s Third Law of**Motion? • Objects at rest stay at rest. • If you apply a net force, acceleration will occur. • Objects in motion stay in motion. • For every action there is an equal and opposite reaction. • I don’t know – I need help!**A space shuttle is being launched. Identify the action**force. • Release of Gas • Gravity • Lift-Off • Weight of Shuttle • I don’t know- I need help!**How does Newton’s 3rd Law apply to your ability to walk?**• Ground pushes down and your foot pushes up. • Your foot pushes down with a greater force and the ground pushes back with a lesser force. • Your foot pushes down on the ground and the ground pushes back with an equal force. • I don’t know, I need help.