Students are going to conduct an experiment to study the effect of a net force applied to an object on the object’s motion. In each trial of the experiment, the students will apply a net force on the object. They also need to take two other measurements. What are the other quantities they should measure in each trial of the experiment?(1 point)
Responses
mass and acceleration
mass and acceleration
mass and velocity
mass and velocity
acceleration and time
acceleration and time
velocity and time
The other quantities the students should measure in each trial of the experiment are:
1. Mass - The amount of matter in the object being studied. It is an important factor in determining how the object responds to the net force applied to it.
2. Acceleration - The rate of change of velocity of the object. By measuring the acceleration, the students can determine the effect of the net force on the object's motion.
Therefore, the correct answer is:
Mass and acceleration
Use the data table to answer the question. It shows the acceleration of a body when a net force is applied to it.
Net force (N) Mass (kg) Acceleration (m/s2)
5.0 5.0 1.0
10.0 5.0 2.0
20.0 5.0
Which value would complete the last cell?
(1 point)
Responses
100.0
100.0
3.0
3.0
25.0
25.0
4.0
To determine the value that would complete the last cell in the table, we can use the formula:
Acceleration = Net force / Mass
In the first two rows of the table, the acceleration values are calculated by dividing the net force by the mass. Therefore, to find the value for the last cell, we can rearrange the formula:
Net force = Acceleration * Mass
For the last cell, the given values are:
Mass = 5.0 kg
Acceleration = 2.0 m/s^2
Using the formula, we can calculate the net force:
Net force = 2.0 m/s^2 * 5.0 kg = 10.0 N
Therefore, the value that would complete the last cell is:
10.0 N
what the answer
The value that would complete the last cell in the table is 10.0 N.
Use this graph of velocity vs. time for two objects to answer the question.
A velocity versus time graph shows two lines sloping upward from the origin. The line with the higher slope is labeled, C, and the line with smaller slope is labeled, D.
Which statement makes an accurate comparison of the motions for objects C and D?
(1 point)
Responses
Objects C and D have different velocities but the same acceleration.
Objects C and D have different velocities but the same acceleration.
Object D has an acceleration that is greater than the acceleration for C.
Object D has an acceleration that is greater than the acceleration for C.
Objects C and D have different accelerations but the same velocity throughout the motion.
Objects C and D have different accelerations but the same velocity throughout the motion.
Object C has an acceleration that is greater than the acceleration for D.
Object C has an acceleration that is greater than the acceleration for D.
The correct statement that makes an accurate comparison of the motions for objects C and D is:
Object D has an acceleration that is greater than the acceleration for C.
Use the equation for motion to answer the question.
x=x0+v0t+12at2
x
=
x
0
+
v
0
t
+
1
2
a
t
2
An object has a starting position of 2 m, a starting velocity of 15 m/s, and is moving at a constant speed. Which option shows the final position of the object after 1 s?
(1 point)
Responses
30 m
30 m
32 m
32 m
17 m
17 m
60 m
To find the final position of the object after 1 second, we can use the equation for motion:
x = x0 + v0t + (1/2)at^2
Given:
Initial position (x0) = 2 m
Initial velocity (v0) = 15 m/s
Time (t) = 1 s
Acceleration (a) = Since the object is moving at a constant speed, the acceleration is 0 m/s^2.
Plugging in the values into the equation:
x = 2 + 15(1) + (1/2)(0)(1^2)
x = 2 + 15 + 0
x = 17 m
Therefore, the final position of the object after 1 second is:
17 m
The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?(1 point)
Responses
The velocity is zero.
The velocity is zero.
The velocity is constant and non-zero.
The velocity is constant and non-zero.
The acceleration is constant and non-zero.
The acceleration is constant and non-zero.
The acceleration is negative.
The correct answer is:
The velocity is zero.
explain the effects of acid rain on the environment.
Acid rain is rainwater that has been contaminated by pollutants, primarily sulfur dioxide (SO2) and nitrogen oxides (NOx), released from human activities such as burning fossil fuels. When acid rain falls, it can have several detrimental effects on the environment:
1. Soil and Water Acidification: Acid rain has the potential to lower the pH level of the soil and bodies of water. This increase in acidity can have harmful consequences for plants, trees, and aquatic life. Acidic soil makes it difficult for plants to absorb essential nutrients, leading to stunted growth and decreased crop yields. Acidic water bodies can harm fish, amphibians, and other aquatic organisms, affecting their reproduction and survival.
2. Forest Decline: Acid rain has been linked to the decline of forests, especially in areas with thin or infertile soils. It weakens trees by damaging their leaves, reducing their ability to photosynthesize and produce food. Acid rain can also leach nutrients from the soil, further depriving trees of essential minerals and making them more susceptible to diseases, pests, and harsh weather conditions.
3. Damage to Buildings and Infrastructure: Acid rain can corrode and deteriorate building materials, monuments, and infrastructure made of limestone, marble, metal, and concrete. This leads to the degradation and weakening of structures, affecting their aesthetics, structural integrity, and lifespan.
4. Impact on Aquatic Ecosystems: Acid rain can have severe consequences for aquatic ecosystems. It increases the acidity of lakes, rivers, and streams, which can be lethal to aquatic organisms like fish, insects, and amphibians. Acid rain can also disrupt the food chain in water bodies by killing plankton and other small organisms that serve as a food source for larger species.
5. Air Pollution Exacerbation: Acid rain is a byproduct of air pollution, and its formation is closely linked to the release of pollutants into the atmosphere. Acid rain contributes to poor air quality, which can have detrimental health effects on humans, including respiratory issues such as asthma and bronchitis.
To mitigate the effects of acid rain, measures such as reducing emissions of sulfur dioxide and nitrogen oxides, implementing clean energy alternatives, and employing pollution control technologies are essential. Additionally, preserving and restoring affected ecosystems can help in their recovery from the damage caused by acid rain.