Practice test on velocity and acceleration

Extra credit.  Print this and complete the questions and turn in for extra credit.  Must get 90% to receive credit.

What is Motion?


Solve the following problems. Show all your work. Remember to include the correct units.

1. A student practicing for a track meet ran 250 m in 30 sec.
a. What was her average speed?

b. If on the following day she ran 300 m in 30 sec, by how much did her speed increase?

 


2. A car traveled 1025 km frm El Paso to Dallas in 13.5 hr. What was its average velocity?

 


3. How fast was a plane flaying if it traveled 400 km in 30 min?

 


4. A student walks 10 blocks to a computer store (Assume all the blocks are equal length.)
a. How long will it take him to reach the computer store if he walks 3 blocks in 2 min?

b. What is his average velocity?

 


5. If the average speed a car is 45 km/hr, how far can it travel in 40 min?

 


6. The speed of light is 3 X 10 to 8th m/sec. How long does it take light to travel the 149 X 10 to 9th m distance from the sun to the Earth?

 


7. A driver starts his parked car and within 5 sec reaches a velocity of 54 km/hr as he travels east. What is his acceleration?

 


8. Falling objects drop with an average acceleration of 9.8 m/sec/sec/ or 9.8 m/sec to second. If an object falls from a tall building, how long will it take before it reaches a speed of 49 m/sec?

 

 


What is Motion?

 Multiple Choices Write the letter of the correct answer on the line at the left.


____________1. Which of the following are important in measuring motion?

a. Distance, time, speed
b. Velocity, acceleration, density
c. Distance, volume, speed
d. Acceleration, momentum, speed

 

____________2. The distance traveled by an object per unit time is called:

a. Velocity
b. Speed
c. Momentum
d. Acceleration

 

____________3. Motion is:

a. An increase in the speed of an object
b. A decrease in the speed of an object
c. The stopping of an object relative to a frame of reference
d. A change in position relative to a frame of reference

 

___________4. Find the speed of any object that covers 400 km in 5 hr.

a. 40 km/hr
b. 80km/hr
c. 2000 km/hr
d. 800 km/hr

 

___________5. Velocity is:

a. The same as speed
b. The same as acceleration
c. Speed in a specific direction
d. The same as momentum

 

___________6. Acceleration is the:

a. Rate of change in momentum
b. Rate of change in speed
c. Rate of change in velocity
d. Amount of time needed for an object to reach its destination

 

___________7. Deceleration is:

a. Negative velocity
b. Negative speed
c. Negative acceleration
d. Negative density

 

___________8. What is the acceleration of an object that takes 20 sec to change from a speed of 200 m/sec to 300 m/sec?

a. 5 m/sec
b. 5 m/sec/sec
c. 100 m/sec
d. 100 m/sec/sec

 

___________9. An object traveling at a constant 20m/sec in a circular path is changing its:

a. Speed
b. Momentum
c. Velocity
d. Mass

 

___________10. The object or point from which movement is determined is called:

a. Terminal velocity
b. Motion
c. Momentum
d. Frame of reference

COMPLETION

Complete each statement on the line at the left.

___________1. The most common frame of reference is the _________.
___________2. The rate at which n object moves is called__________.
___________3. The distance-time graph for constant speed is a (an) _________time.
___________4. The momentum of an object can be found by multiplying its mass times its________.
___________5. The length between two places is called_________.
   

TRUE OR FALSE

Determine whether each statement is true or false. If it is true, write T. IF it is false, change the underlined work or words to make the statement true.

___________ ______________1. Movement can be measured only in reference to something that is assumed to be fixed in place.
___________ ______________2. Speed that does not change is called average speed.
___________ ______________3. Speed equals acceleration divided by time.
___________ ______________4. In circular motion, the velocity of an object is constantly changing.
___________ ______________5. The distance-time graph for acceleration is always a straight line.

 

Motion  Graph
1. How many meters can Swimmer 1 cover in 30 sec? ___________________________________
2. How far will Swimmer 2 go in 30 sec? ___________________________________
3. Predict the number of m Swimmer 1 can go in 60 sec. ___________________________________
4. Predict the number of m Swimmer 2 can go in 60 sec. ___________________________________
5. Which swimmer has the greatest speed? ___________________________________
6. Calculate the speed of Swimmer 1. ___________________________________
7. Calculate the speed of Swimmer 2. ___________________________________

 

ESSAY

Write a brief paragraph discussing each of the following statements or questions.

 

1. In an amusement park you stand against the inside wall of a circular object that resembles a tin can. The circular object begins to whirl around. After a constant speed is reached, the floor drops down, but your are held fast against the whirling wall. Ate you being accelerated? Explain your answer.

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2. A 500-kg car proceeding at a speed of 100 km/hr is in a head-on collision with a 1500-kg pickup truck going 10 km/hr. The smaller car pushes the pickup truck back. Explain this situation.

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3. You are riding on a train going north and you see a car traveling north parallel to the train. Yet the car seems to be going backward. Explain this occurrence.

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4. Explain why the pilot of a plane must have precise measurement s of velocity.

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5. Explain why the slowing down of a moving object is considered to be a form of acceleration.

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