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Force and Motion
| Question | Answer |
|---|---|
| What is force? | A push or a pull |
| What unit do we measure force in? | Newtons |
| What is work? | Amount of energy transferred by a force over a certain distance |
| What force is being applied to an object whose mass is 30kg and is accelerating at a rate of 10m/s/s F=MxA | 300 N |
| Billy is jumping on a trampoline. The harder he jumps down, the harder the trampoline pushes him up. Which one of Newton's Laws of Motion is this an example of? | Third Law |
| In a Newton's Cradle, when one ball on one side is lifted and dropped, one ball on the opposite side will do the same. Which law of motion does this illustrate? | Third Law |
| The acceleration of a dogsled depends on the force provided by the dogs and the --- (hint: F=MxA) | Mass of the sled |
| Books sit on a self, not moving until someone touches them; which law of motion is this? | First Law |
| In Science a push or pull is called a _______. | Force |
| One soccer player kick the ball with 100 N of force to the left, the other soccer player kicks the ball with 50 N of force to the right at the same time. What is the net force exerted on the ball. Include direction. | 50 N to the left |
| Using the formula W=FxD, how much work is being done by a person who pushes a lawnmower with a force of 40N a distance of 250m? | 10,000 J |
| How much force is applied to move a rock 20 m using 30,000 J of work? W-FxD | 1,500 N |
| Bus 65 travels 90 meters in 3 seconds. Bus 234 travels 75 meters in 2 seconds. Which is traveling faster? S=D/T | Bus 234 |
| How many hours would it take for a black marlin to swim 500 miles if it swims 70 mph? (S=D/T) | 7.14 hours |
| Describe a motion graph that would show an object moving at a constant speed away from the reference point. | A straight, diagonal line going up and to the right |
| On a motion graph, what does a straight, flat line with no slope represent? | An object that is not moving |
| A roller coaster travels 150 meters in 12 seconds. As it does this, it turns a corner east. What is its velocity? (V=D/T) | 12.5 m/s East |
| A cyclist accelerates from 0 m/s to 10 m/s in 4 seconds. What is their acceleration? A= Vf-Vi/T | 2.5 m/s/s |
| A car advertisement claims the car can accelerate from 0 mph to 60 mph in 3.5 seconds. Find the cars acceleration. A = Vf-Vi/T | 17.14 m/s/s |
| A car is driving on the highway at a speed of 80 mph. As it drives, it goes around a bend and changes it's direction from North to West. What two thing change in this example? | Velocity and acceleration |
| What are two ways simple machines can make work easier? | 1. Changing the direction of the force exerted 2. Changing the amount of input force needed |
| Friction always moves in the _____ directions from a force applied. | Opposite |
| Objects will only move when the net force applied to them..... | Doe not equal zero |
| What is an independent variable? | The variable changing in a scientific investigation. |
| If you do 105 J of work in 3 seconds, what is the power you exerted? (P=w/t) | 35 J/s |
Created by:
smorrow801
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