- Speed with direction is called...
Your answer:
Acceleration
Displacement
Velocity
Momentum
- A running back travels for 4s at 8 m/s, then 3s at 4 m/s, and lastly for 6s at 7m/ s before being tackled. What was his average speed?
Your answer:
6.6 m/s
6.1 m/s
6.3 m/s
5.8 m/s
- What was the total distance traveled by the running back in question 2
Your answer:
82 m
100 m
86 m
19 m
- If you move towards a motion detector at constant speed the v-t graph wil have..
Your answer:
zero slope and be negative
a constant positive slope (not zero)
a constant negative slope (not zero)
zero slope and be positive
- If you move away from a motion detector at an increasing rate the d-t graph will
Your answer:
be flat
have a constant positive slope
have a constant negative slope
increase at a non-constant rate
- When you look at the speedometer in a moving car, you see the car's..
Your answer:
average speed
instantaneous speed
instantaneous acceleration
average sistance traveled
- Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is not true?
Your answer:
Your acceleration is constant
Your velocity is constant
Your speed is constant
You and the car are accelerating
- Acceleration is defined as the change in..
Your answer:
time it takes to move from one speed to another speed
velocity divided by the time interval
distance divided by the time interval
velocity of an object
- In 1991, four english teenagers built an electric car that could obtain a speed of 30 m/s. Suppose it takes 8.0 s for this car to accelerate from 18 m/s to 30 m/s. What is the magnitude of the car's acceleration?
Your answer:
1.5 m/s/s
1.7 m/s/s
3.8 m/s/s
6 m/s/s
- A student cycling their bike at 10 m/s slows down to a stop in a distance of 20m. What is their rate of deceleration?
Your answer:
10 m/s/s
.5 m/s/s
5 m/s/s
2.5 m/s/s
- What is the meaning of free fall?
Your answer:
Changing motion due to the influence of gravity only
Falling downwards
Falling downwards while only under the influence of gravity
No forces acting on an object
- Form your video analysis lab, what does the slope of the tangent line on a d-t graph tell you?
Your answer:
instantaneous velocity
average velocity
displacement
acceleration
- The equation used to describe a d-t graph is d = 20m + (-4m/s)t . The shape of the line on the graph is
Your answer:
a flat line
a diagonal line with negative slope
a diagonal line with postive slope
a parabolic curve with changing slope
- A ball tossed vertically upward rises, reaches its highest point, and then falls back down to its starting point. During this time the acceleration of the ball is always..
Your answer:
directed upward
directed downward
in the direction of motion
opposite its velocity
- A ball is thrown straight up. At the top of its path its acceleration is..
Your answer:
about - 10 m/s/s
about - 5 m/s/s
about - 20 m/s/s
0 m/s/s
- If a freely falling object were somehow equipped with a speedometer, its speed reading would change each second by..
Your answer:
a rate that depends on its initial speed
about 5 m/s
a variable amount
about 10 m/s
- In the absence of air resistance, objects fall at constant ..
Your answer:
velocity
acceleration
distances each successive second
all of these are true
- Suppose a jumper claims a hang time of 2 seconds. Then that jumper must be able to jump a distance of..
Your answer:
2 m
4 m
5 m
1 m
- What speed must you toss a ball straight up so that it takes 4.0 s to return to you?
Your answer:
20 m/s
40 m/s
10 m/s
80 m/s
- A projectile fired beneath the water, straight up, breaks the surface at a speed of 16 m/s, to what height above the water will it ascend?
Your answer:
12.8 m
1.6 m
6.4 m
0.8 m