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**Indicate what effect the change will have on the acceleration.**

The mass of the cart is increased to 2 kg.

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For 100 points The acceleration decreases

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**Indicate what effect the change will have on the acceleration.**

The towing force is increased to 1.0 N.

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For 500 points The acceleration increases

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**Indicate what effect the change will have on the acceleration.**

Both the mass of the cart and the towing force are doubled.

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For 300 points The acceleration remains the same

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**Indicate what effect the change will have on the acceleration.**

The 0.5 N towing force is applied at an angle as shown at right.

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For 1000 points The acceleration decreases

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**Indicate what effect the change will have on the acceleration.**

The track is inclined as shown below at right.

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For 2500 points The acceleration decreases

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**Indicate what effect the change will have on the acceleration.**

The 0.5 N force is applied to two 500 g carts hooked together as shown below right.

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For 400 points The acceleration remains the same

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**Draw the position vs. time and acceleration vs**

Draw the position vs. time and acceleration vs. time graphs corresponding to the velocity graph between points c and d

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For 100 points

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**For the interval from a to b the train is: a. speeding up. **

b. slowing down. c. moving at constant speed. d. moving in the negative direction.

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For points b. slowing down

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**Is the net force on the train equal to zero at any time? Explain.**

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For points From b to c because the train is moving at a constant speed

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**Where is the net force on the train the largest? Explain.**

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For 1000 points From c to d because the acceleration is the greatest between those two points

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**A 700. kg Yugo can go from rest to a speed of 45 m/s in 9. 0s**

A 700. kg Yugo can go from rest to a speed of 45 m/s in 9.0s. What average net force acts on the car?

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For 100 points 3500 N

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**Consider the block on a surface below**

Consider the block on a surface below. The coefficient of friction, µ, is 0.20. If a 10. N force is applied to the block, what is its acceleration?

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For 8000 points 3 m/s2

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**Consider the block on a surface below**

Consider the block on a surface below. The coefficient of friction, µ, is 0.20. How fast will the block be moving if the force of 10 N is applied for 5.0s?

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For 200 points 15 m/s

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**Consider the block on a surface below**

Consider the block on a surface below. The coefficient of friction, µ, is 0.20. How far will the block travel if the force of 10 N is applied for 5.0s?

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For 300 points 38 m

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The diagram below depicts a frictionless apparatus similar to that used for your Newton's 2nd Law experiment. Block A has a mass of 25 kg and block B has a mass of 5.0 kg. Determine the acceleration of the system and the tension in the string.

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For 3000 points 1.6 m/s2 41 N

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**A 70. 0 kg box is pulled across a frictionless surface by a 300**

A 70.0 kg box is pulled across a frictionless surface by a 300. N force at an angle of 30.° to the horizontal. What is the acceleration of the box in the x-direction?

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For 400 points 3.7 m/s2

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**A 70. 0 kg box is pulled across a frictionless surface by a 300**

A 70.0 kg box is pulled across a frictionless surface by a 300. N force at an angle of 30.° to the horizontal. What is the normal force on the box?

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For 500 points 536 N

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**A 20.0 kg block is allowed to accelerate down a ramp with negligible friction.**

Determine the acceleration of the block.

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For 200 points 3.2 m/s2

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**A 20.0 kg block is allowed to accelerate down a ramp with negligible friction.**

Would the acceleration be different if the mass of the block were 10kg? Explain.

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For 600 points No, because it is gravity that is pulling the block down the ramp. Only changing the incline changes the acceleration, as long as the ramp is frictionless.

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For 300 points

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