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| A ball is kicked straight up at 30 m/sec. It reaches its highest point in??? |
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| A ball is tossed up, and falls down. Howdo you calculate the entire trip, up and down? |
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| A ball is kicked upwards with a velocity of 40 m/sec. What is the final velocity when it hits the ground? |
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| What are the units for acceleration? |
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A car moves starts at marker 8 and moves forward 6 meters in 6 seconds, then back 4 meters in 2 seconds.
What is the total displacement ?
What is the total distance traveled
What is the average velocity of the car between 0 and 10 seconds?
What is the speed of the car between 0 and 6 seconds?
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Definition
Displacement = end -start which is -2m
Total distance is start to finish 10m
Average velocity is -.2m/s
Speed: you figure that one out..... |
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Describe the displacement, acceleration for this a car if it had an initial speed of 25m/s, applied its brakes, and stopped in 5 seconds. |
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Definition
Acceleration = 5m/s/s
Displacement = 25 m |
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Rocket launch from the ground.
Launch = 25 m/s
How long to reach max height?
total time in air?
Max height?
Velocity upon impact with ground?
Displacement? |
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Definition
how long? 2.5 s
Total time? 5 se
Max height? 31.25
Velocity? (-10m/s * 2.5)
Displacement? you figure that one out. |
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A rocket is fired into the air, and returns. What does the position v time graph look like?
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car drives off cliff.
What do you need to know to calculate when it hits the ground and how far from the base it lands
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Definition
| speed and height of cliff |
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| What is the vertical velocity of a car driving 35 m/s off an 80 m cliff? |
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Describe the force pairs of a ball sitting on book sitting on a desk. |
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Definition
| Book on Ball and Ball on Book |
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| Why are airbags safer than hitting the windshield? |
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Definition
| The Airbag increases the stopping time, decreasing the force on the driver. |
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An 8 kg cannon ball is fired from an 800 kg cannon
Which has the larger change in velocity, the ball or the cannon? Why? |
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Definition
| The ball: smaller mass needs larger change in velocity? |
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[image]
When the cannon fires the cannon ball, which exerts more force? |
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Definition
| The forces are equal upon impact |
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Term
| If you weigh 76 kg, how many Newtons do you weigh? |
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200 kg ice boat
two boaters, one to the south with 500 N one to the west with 1200 N.
What is the combined force? |
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200 kg ice boat
two boaters, one to the south with 500 N one to the west with 1200 N.
What is the resulting acceleration?
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| A 1000 kg VW traveling at 8 m/s, collides with a 2500 kg traveling at 4 m/s. Which has the greater force? |
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Definition
| Neither, according to Newton's 3rd law, the forces are equal. |
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Term
| ΔWhen an 8 kg cannon ball is fired from an 800 kg cannon, what do you need to know to calculate the speed of the ball? |
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Definition
| How much force the cannon applies to the ball and for how long. |
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Term
What are these formulas?
ΔΡ=mΔv
ΔP=FΔt |
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Definition
| momentum equals mass time change in velocity or momentum equal force times time |
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Term
| Convert 76 kg to Newtons. |
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Term
A student with a mass gets on an elevator. The elevator moves so that the arbitrary scale the student stands on reads 1260. What is the unbalance force on the student?
What is the acceleration? |
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| What is acceleration due to gravity? |
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