Phys 1010 Midterm Questions and
Answers|Latest Update
Find the following for path A in Figure 2-59: (a) The distance traveled. (b) The magnitude of the
displacement from start to finish. (c) The displacement from start to finish. Figure 2-59 7
m, 7 m, 7 m
If there is a non-zero constant acceleration, which statement is false: The displacement
will increase or decrease linearly with time
If there is a constant velocity in a situation, which statement is true: The displacement will
either increase or decrease linearly
Question point
Suppose you throw a rock nearly straight up at a coconut in a palm tree, and the rock misses on
the way up but hits the coconut on the way down. Neglecting air resistance, how does the speed
of the rock when it hits the coconut on the way down compare with what it would have been if it
had hit the coconut on the way up? Same
,If an object is thrown straight up and air resistance is negligible, then its speed when it returns to
the starting point is the same as when it was released. Is this true for its velocity? Yes. The
velocity will be the same, since the speed is the same.
Assuming constant acceleration, what is the relationship between displacement and average
velocity on a graph? There is a linear relationship between displacement and average
velocity.
Identify the time or times ( ta , tb , tc , etc.) in Figure 2.57 at which the acceleration is negative.
ta refers to point a on the graph.Figure 2.57 ti, tj, tk, tl
This quantity is the slope of the displacement versus time graph. Velocity
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of
11.5 m/s and accelerates at the rate of 0.500 m/s2 for 7.00 s. What is the racer's final velocity in
m/s? 15.0
There is a 250-m-high cliff at Half Dome in Yosemite National Park in California. Suppose a
boulder breaks loose from the top of this cliff. With what velocity will it strike the ground,
assuming that we define the ground to be a height of 0 meters? -70 m/s
, A swan on a lake gets airborne by flapping its wings and running on top of the water. If the swan
must reach a velocity of 6.00 m/s to take off and it accelerates from rest at an average rate of
0.350 m/s2, how far (in meters) will it travel before becoming airborne? 51.43
Using approximate values, calculate the slope of the curve in Figure 2.62 0.24 m/s
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of
10.0 m/s and accelerates at the rate of 0.500 m/s2. If the racer was 300 m from the finish when
starting to accelerate, what is the racer's final velocity in m/s? 20
A graph of velocity versus time is shown for a world-class track sprinter in a 100-m race (Figure
2.67). How long (in seconds) did it take for her to run the first 50 meters? 6.2 s
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts
with a positive vertical velocity of 4.00 m/s, and her takeoff point is 1.80 m above the pool. How
long is she in the air (in seconds)? 0.816
Answers|Latest Update
Find the following for path A in Figure 2-59: (a) The distance traveled. (b) The magnitude of the
displacement from start to finish. (c) The displacement from start to finish. Figure 2-59 7
m, 7 m, 7 m
If there is a non-zero constant acceleration, which statement is false: The displacement
will increase or decrease linearly with time
If there is a constant velocity in a situation, which statement is true: The displacement will
either increase or decrease linearly
Question point
Suppose you throw a rock nearly straight up at a coconut in a palm tree, and the rock misses on
the way up but hits the coconut on the way down. Neglecting air resistance, how does the speed
of the rock when it hits the coconut on the way down compare with what it would have been if it
had hit the coconut on the way up? Same
,If an object is thrown straight up and air resistance is negligible, then its speed when it returns to
the starting point is the same as when it was released. Is this true for its velocity? Yes. The
velocity will be the same, since the speed is the same.
Assuming constant acceleration, what is the relationship between displacement and average
velocity on a graph? There is a linear relationship between displacement and average
velocity.
Identify the time or times ( ta , tb , tc , etc.) in Figure 2.57 at which the acceleration is negative.
ta refers to point a on the graph.Figure 2.57 ti, tj, tk, tl
This quantity is the slope of the displacement versus time graph. Velocity
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of
11.5 m/s and accelerates at the rate of 0.500 m/s2 for 7.00 s. What is the racer's final velocity in
m/s? 15.0
There is a 250-m-high cliff at Half Dome in Yosemite National Park in California. Suppose a
boulder breaks loose from the top of this cliff. With what velocity will it strike the ground,
assuming that we define the ground to be a height of 0 meters? -70 m/s
, A swan on a lake gets airborne by flapping its wings and running on top of the water. If the swan
must reach a velocity of 6.00 m/s to take off and it accelerates from rest at an average rate of
0.350 m/s2, how far (in meters) will it travel before becoming airborne? 51.43
Using approximate values, calculate the slope of the curve in Figure 2.62 0.24 m/s
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of
10.0 m/s and accelerates at the rate of 0.500 m/s2. If the racer was 300 m from the finish when
starting to accelerate, what is the racer's final velocity in m/s? 20
A graph of velocity versus time is shown for a world-class track sprinter in a 100-m race (Figure
2.67). How long (in seconds) did it take for her to run the first 50 meters? 6.2 s
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts
with a positive vertical velocity of 4.00 m/s, and her takeoff point is 1.80 m above the pool. How
long is she in the air (in seconds)? 0.816
