Find displacement, velocity and acceleration.
1. Displacement is which of the following types of quantities?
a. vector
b. scalar
c. magnitude
d. Dimensional
2. A bird, accelerating from rest at a constant rate, experiences the displacement of 28 m in 11 s. What is an average velocity?
a. 1.7 m/s
b. 2.5 m/s
c. 3.4 m/s
d. 4.2 m/s
e. Zero
3. Jeff throws a ball straight up. For which situation is the vertical velocity zero?
a. on the way up
b. at the top
c. on the way back down
d. both a and c are correct
e. none of the above
4. A railroad train travels forward along a straight track at 80 m/s for 1.000 m and then travels at 50.0 m/s for the next 1.000 m. What is an average velocity?
a. 65.0 m/s
b. 61.5 m/s
c. 63.7 m/s
d. 70.0 m/s
e. 68.3 m/s
5. A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s. What is its acceleration?
a. 0.21 m/s2
b. 0.46 m/s2
c. 0.64 m/s2
d. 0.78 m/s2
e. 0.97 m/s2
6. A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8s. What distance will the sports car travel during the 8 s acceleration period? (Hint: First convert speed to m/s.)
a. 55.5 m
b. 77.7 m
c. 111 m
d. 222 m
e. 268 m
7. A rock is thrown straight up with an initial velocity of 19.60 m/s. What time interval elapses between the rocks's being thrown and its return to an original launch point? (Acceleration due to gravity is 9.80 m/s2.)
a. 4.00 s
b. 5.00 s
c. 8.00 s
d. 10.0 s
e. 15.0 s
8. A baseball is released at rest from the top of Washington Monument. It hits the ground after falling for 6s. What was the height from which the ball was dropped? (g = 9.8 m/s2 and assume air resistance is negligible)
a. 1.5 102 m
b. 1.8 102 m
c. 1.1 102 m
d. 2.1 102 m
e. 2.5 102 m
9. A ball is thrown vertically upwards at 19.60 m/s. For its complete trip (up and back down to the starting position), its average speed is:
a. 19.6 m/s.
b. 9.80 m/s.
c. 4.90 m/s.
d. 3.15 m/s.
e. Not given.
10. A jogger runs halfway around a circular path with a radius of 60 m. What, respectively, are the magnitude of the displacement and the distance jogged?
a. 60 m, 188 m
b. 120 m, 188 m
c. 0 m, 377 m
d. 120 m, 377 m
e. 60 m, 377 m