Name ____________________________________ Date ______________ ID _____________________ Physics (1) Interim Assessment – First Grading Period
1. The dimensions (units) of two quantities MUST be identical if you are either adding or multiplying. subtracting or dividing. multiplying or dividing. adding or subtracting.
2.
A girl walks for exercise. She walks 4km, then 5km, then 4km, and then 2km, all at right angles to each other as shown in the diagram. The magnitude of her resultant displacement from her original starting point is 4 km. 15 km. 3 km. 5 km.
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3. On a graph that shows position/distance on the vertical or Y axis and time on the horizontal or X axis, a straight line with a positive slope represents a constant positive acceleration. a constant negative acceleration. a constant positive velocity. a constant negative velocity.
4.
Which graph of velocity versus time best describes the motion of a car that is moving forward and speeding up? 1 2 3 4
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5.
A remote controlled toy truck moves along the ground according to the position/time graph shown in the diagram. At which point or points is the truck instantaneously at rest? A and E B, D, and E C only E only
6. A sports car starts at rest and accelerates uniformly to a speed of 27.0 m/s in 11.8s. Calculate the acceleration of the car during this time interval. 2.29 m/s2 318.6 m/s2 27.0 m/s2 .437 m/s2
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7.
A car accelerates uniformly from a velocity of 10 km/h to 30 km/h in one minute. Which graph best describes the motion of the car? 1 2 3 4
8. An object falling near the surface of the earth has a constant acceleration of 9.8 m/s2. This means that the object falls 9.8 m during the first second of its motion. object falls 9.8 m during each second of its motion. speed of the object increases by 9.8 m/s during each second of its motion. acceleration of the object increases by 9.8 m/s2 during each second of its motion.
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9.
The graph is a plot of velocity versus time for a moving object during a particular time interval. Which of the following statement is correct? The acceleration of the object is zero. The acceleration of the object is constant. The acceleration of the object is increasing in magnitude. The acceleration of the object is decreasing in magnitude.
10.
A ball has been thrown upward and falls back down to the ground. The graph shows the ball's position as a function of time. Which one of the following statements best describes the motion of the ball? The velocity of the ball is the same at points A, B, C, D, and E. The acceleration of the ball is -9.8 m/s2 at points A, B, D, and E and zero at point C. The acceleration of the ball is -9.8 m/s2 at points A, B, C, D, and E. The velocity of the ball is the same at points B and D.
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11. You walk 5 km north and then 12 km east. Your resultant displacement is 13 km at an angle of 22.6° north of east. 13 km at an angle of 67.4° north of east. 17 km at an angle of 22.6° north of east. 17 km at an angle of 67.4° north of east.
12. A bullet is fired from a gun with an initial speed of 1000 m/s and at an angle of 37° above the horizontal. The horizontal component of the bullet's velocity the moment it leaves the gun is approximately 600 m/s. 800 m/s. 640 m/s. 160 m/s.
13. All of the following statements are true of a projectile moving near the surface of the earth with no air resistance except: The horizontal velocity is constant. The vertical acceleration is constant. The horizontal displacement is directly proportional to the time of flight. The vertical velocity is constant.
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14.
The above figure represents the parabolic trajectory of a ball going from A to E in earth gravity but without air resistance. What is the direction of the acceleration at point B? It is up and to the right. It is down and to the left. It is straight up. It is straight down.
15. Your friend runs on the track team at school. She runs 100 meters in 12 seconds. She would like to know her average speed in kilometers per hour. The correct answer to her question is 30 km/h. 8.3 km/h .008 km/h 2.3 km/h
16. A skydiver jumps from an airplane and falls without a parachute until he reaches his terminal velocity. What is his acceleration when he is falling at terminal velocity? -9.8 m/s2 0 m/s2 more than -9.8 m/s2 less than -9.8 m/s2
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17. You are riding in a car that is traveling at 45 mph down a straight road. You reach out the window and throw a ball foward as hard as you can so that the ball leaves your hand at 50 mph. To your friend, who is standing on the side of the road watching you as you drive by, the velocity of the ball relative to his position is 45 mph. 50 mph. 95 mph. 5 mph.
18. The formula for the final velocity of an object that is accelerating can be written as
To use this same formula to solve for the time t, you would change the formula to
19. While traveling in a car at 65 mph, you pass a school bus traveling in the same direction at 50 mph. The speed of your car, relative to the students on the bus, is 115 mph. 85 mph. 65 mph. 15 mph.
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20. During a classroom laboratory about motion, you mark the distance that a toy car travels each second as it moves across the room. You want to graph the distance the car traveled for each corresponding time interval to analyze the results of your experiment. You should use the horizontal or "X" axis to plot the distance as the dependent variable. time as the dependent variable. distance as the independent variable. time as the independent variable.
21. Your friend says that his car will accelerate much better than your car. He claims his car accelerates at 10 m/s2. To test his statement, you decide to measure the time it takes for his car to accelerate from rest to a final velocity. If his claim is true, what velocity should his car reach after 5 seconds of acceleration? 50 m/s 250 m/s 2 m/s 500 m/s
22. You aim a toy dart gun at a target held up in the air by another student. You know the dart can reach the target, and your goal is to hit the center of the target with the dart. The other student likes to play tricks, so you think he will drop the target the instant you shoot the dart from the gun. Knowing this, you should aim the dart above the target. below the target. at the floor. at the target. 23. A ball rolls off a table and falls to the floor below. The horizontal velocity of the ball when it leaves the table is 3.5 m/s. It takes 1.2 seconds for the ball to hit the floor. What is the horizontal distance from the edge of the table to the spot where the ball lands? 4.2 m 2.9 m 5.0 m .34 m
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24. During a classroom laboratory, you measured the distance and time of a bowling ball moving in a straight line down the hallway. The results of your measurements are shown in the chart below. Based upon the data given, predict the speed of the ball during the next second of motion. Time (s) 0 1 2 3 4
Distance from the start (m) 0 2.00 3.75 5.25 6.50
7.00 m/s 1.25 m/s 1.0 m/s 2.0 m/s
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