Review for Exam on Chapters 1, 2, and 3

Honors Physics

Mr. Melnik

1) What is the percent uncertainty in the measurement 4.58 ± 0.15 cm?

2) The number of significant figures in 0.015000 is

3) What is the sum of 3.67 + 1.956 + 2.1?

4) A rectangle is 3.48 m long and 1.5 m wide. What is its area?

5) Write the number 18.5 gigameters as full (decimal) numbers with standard units.

6) If 1 inch = 2.54 cm, how many square centimeters are in 1.00 square meter.?

7) A football field is 110 yd long and 50 yd wide. What is the area of the football field, in m2, if 1 yd = 91.44 cm?

8) A ball has a radius of 4.23 cm. What is the volume of the ball in m3?

9) Can an object's velocity change direction when its acceleration is constant? Support your answer with an example.

10) Objects A and B both start at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B?

11) Objects A and B both start from rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B?

12) When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion?

13) Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them

14) Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the difference in their speeds

15) Two objects are thrown from the top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the street?

16) A brick is dropped from the top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

17) The slope of a position versus time graph gives

18) The slope of a velocity versus time graph gives

.

19) The area under a curve in an acceleration versus time graph gives

20) The area under a curve in a velocity versus time graph gives

21) An object moves 15.0 m north and then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vector.

22) A ly (light year) is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in a ly? (1 mi = 1609 m, 1 yr = 365 d.)

23) If you run a complete loop around an outdoor track (400 m), in 100 s, your average velocity is

24) A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?

25) A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

26) An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 1000 miles. What is the average speed for the trip?

27) An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed?

28) A car goes from 40 m/s to 80 m/s in a distance of 400 m. What is its average acceleration?

29) A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.00 s?

30) A bullet shot straight up returns to its starting point in 10 s. What is the initial speed of the bullet?

31) A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building?

Fig 2-1

32) In Fig. 2-1, what is the velocity at t = 1.0 s?

33) In Fig. 2-1, what is the velocity at t = 2.5 s?

34) In Fig. 2-1, what is the velocity at t = 4.0 s?

35) In Fig. 2-1, what is the velocity at t = 5.5 s?

36) In Fig. 2-1, what is the average velocity from 0 to 4.0 s?

37) In Fig. 2-1, what is the average velocity from 0 to 6.0 s?

FIGURE 2-2

38) In Fig. 2-2, what is the acceleration at 1.0 s?

39) In Fig. 2-2, what is the acceleration at 3.0 s?

40) In Fig. 2-2, what is the average acceleration from 0 to 5.0 s?

41) In Fig. 2-2, what is the average acceleration from 0 to 8.0 s?

42) In Fig. 2-2, what is the displacement from 0 to 8.0 s?

43) A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 20° above the horizontal. How far does the jumper jump?

44) A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits the level ground below?

45) A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets.

46) A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location of the plane will

47) You are trying to cross a river that flows due south with a strong current. You start out in your motorboat on the east bank desiring to reach the west bank directly west from your starting point. You should head your motorboat

48) A car travels 20 km west, then 20 km south. What is the magnitude of its displacement?

49) A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stop watch measures the stone's trajectory time from the top of the cliff to the bottom to be 5.3 s. What is the height of the cliff?

50) A jumper in the long-jump goes into the jump with a speed of 16 m/s at an angle of 20° above the horizontal. How long is the jumper in the air before returning to the Earth?

51) A jumper in the long-jump goes into the jump with a speed of 16 m/s at an angle of 20° above the horizontal. How far does the jumper jump?