Physics Midterm Study

Data

100

What is 4.8m/s in km/hr?

17.28 km/hr

200

How many hours in 3.6days?

86.4 hours

300

How many sig figs in 4800.

4

400

36.8 x 6.2 in correct sig figs is:

230

500

(15.3+12)/8

3

1-D Motion/Motion Graphs

100

A wide receiver can reach a top speed of 16.9 m/s in 8 seconds. What is his acceleration?

2 m/s²

200

Draw the three graphs distance/velocity/acceleration vs. time graphs for increasing positive velocity.

Answers will vary

300

Carter falls off a tower. He freefalls for 18.4s, what is his final velocity? How far will he fall?

Final Velocity: -181 m/s

Distance Fallen: -1665.2 m

400

What does the slope of a position time graph represent?

Velocity of the object

500

If moving with a constant velocity, what is my acceleration?

Acceleration would be 0

Vectors

100

What does tip to tail method refer to? (draw a picture)

How we add vectors to get a resultant.

400

Scoreboard is suspended from the ceiling by ten cables. Six cables man an angle of 8.0^o with the verticals and the other four mane and angle of 10^o. If the tension in each cable is 1300 N, what is the scoreboard's mass?

1.31x10³ kg

500

Vector A: +12m east

Vector B: -13m south

Vector C: 12 m 45^o N of E

Find A+B+C resultant and direction.

21m @ 12.4^o S of E or 347.6^o

Friction/Newton Laws

100

What is newtons second law of motion?

F=m^.a

200

What are the two equations for friction forces?

F_k=u_k x F_n

F_s=u_s x F_n

300

What are the units for the coefficient of friction? What is the coefficient specific to?

No units, specific to the materials in contact?

400

Draw a picture to represent the importance of equilibrant forces.

Answer will vary.

500

Gwen(Carter) exerts 65-N horizontal force as he pulls a 52-N sled across a sidewalk at a constant speed. What is the coefficient of kinetic friction between the sidewalk and sled?

0.69

Projectile Motion

100

Vertical and horizontal motion are _________of each other.

Independent

200

What is the vertical velocity of an object at its peak travel pathway?

0

300

A dart is thrown horizontally at 9.6 m/s. The dart lands 16.3 m below its original height. How far away is the player from the board?

17.5 m

400

Draw out a motion graph with arrows for a projectile pathway.

Answer will vary.

500

An arrow is shot at 32^o  above the horizontal. Its velocity is 84m/s, and hits the target.

What is the max height?

The target is at the the same launch height, what is the distance from the target to where it started?

Height: 100.9m

time:9.1s

range:647.92 m