Homework Answers
7) It will continue to move until it's acted upon by a force. Correct option - 3rd one
8) If you ignore air resistance, answer is True.
If you take into account the air resistance, the answer is False.
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astronomy
DQ Question 7 1 pts Suppose an object is moving in a straight line at...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object at rest eventually begins to move. B. An object in motion moves in a parabolic trajectory unless acted upon by a net force. C. An object at rest always remains at rest. D. An object at rest remains at rest unless acted upon by a net force. 2.A bowling ball and an apple at a height of 30 meters above the ground is falling...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3 m/s. (a) If it is brought to a stop with a decelera- tion of 1.97 m/s2, what force is required, what distance does the object travel, and how much work is done by the force? (b) An- swer the same questions if the object's deceleration is 4.82 m/s?. 3. To push a 25-kg crate up a 27° incline, a worker exerts a force of...
1) An object is moving in a straight line so that its speed is doubling every...
1) An object is moving in a straight line so that its speed is
doubling every 5 seconds. The acceleration of the object (in
m/s2)is
A) 0.20 B)0.40 C)2.50 D) 5.00 E) constant, but it is none of the
values listed F) constant, but the value is not known without the
initial velocity G) changing
2)Multiple select
astronomy Incorrect Question 1 0/ 1 pts In class I showed how to change the units...
astronomy
Incorrect Question 1 0/ 1 pts In class I showed how to change the units of the Hubble constant from km/s per million light years into sec-1. I claimed that one over this number gave the number of seconds since all the galaxies traced back to being on top of one another. This reasoning is only valid if the speed of any individual galaxy was ___over the entire time of flight. first increasing, then decreasing later constant first decreasing,...
4. In Chapter 1, we showed that for an object moving along a straight line with position function...
4. In Chapter 1, we showed that for an object moving along a straight line with position function s(t), the object's "average velocity on the interval [a, b is given by s(b) s(a) More recently, in Chapter 4, we found that for an object moving along a straight line with velocity v(t), the object's “average value of its velocity function on [a, bl" is v(t)dt Are the 'average velocity on the interval a, b" and the "average value of its...
Question 3 10 pts A skater slides at a constant speed in one straight line on...
Question 3 10 pts A skater slides at a constant speed in one straight line on a level track. She then allows herself to coast to a complete stop, which takes 35 m to stop completely. What was her initial velocity? (Use coefficient of kinetic friction = 0.030; g = 9.81 m/s2) O None of the provided answers are correct more information is needed to answer the question 6.2 m/s 7.9 m/s 4.5 m/s 4.8 m/s 2.4 m/s
Question 2 According to Newton's Laws of Motion, if I throw a baseball in outer space...
Question 2 According to Newton's Laws of Motion, if I throw a baseball in outer space - far from any other object- how will that ball move over time? (For the sake of this problem, let's neglect my mass) After the force of my hand no longer acts on the ball: Question 2 options: the ball will move forward, but it will gradually slow down and come to a stop once the force of my hand no longer acts on...
1. The graph shows the motion of an object traveling in a straight line as a...
1. The graph shows the motion of an object traveling in a straight line as a function of time. What is the average speed of the object during the first two seconds? 5 m/s 2.5 m/s 10 m/s 20 m/s 2. Using the velocity versus time graph, what was the average acceleration of the object during segment B? 0 m/s/s 20 ms/s 10 m/s/s 5 m/s/s 3. Remember to identify all your data, write the equation, and show your work....
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking...
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking garage on planet Earth, 19 m above the ground below. For reasons that are unknown to us, they simultaneously throw pebbles off the deck, each at the same speed of 15 m/s. Kirk throws his up at an angle of 45 degrees above the horizontal, Spock throws his perfectly horizontally, and McCoy, in a fit of pique, throws his straight down toward the ground....
Question 1 1 pts Which one of the following statement is correct about the stars with...
Question 1 1 pts Which one of the following statement is correct about the stars with mass equal to 10% of the solar mass? they are the most common type of Cepheid variable stars objects of 10% of the solar mass cannot be stars all stars of that mass, no matter when they were formed, are still on the main sequence of HR diagram. at the end of their evolution they will become neutron stars at the end of their...
Choose the correct answer Q1: 1. According to Newton's First Law of Motion, A. An object at rest eventually begins to move. B. An object in motion moves in a parabolic trajectory unless acted upon by a net force. C. An object at rest always remains at rest. D. An object at rest remains at rest unless acted upon by a net force. 2.A bowling ball and an apple at a height of 30 meters above the ground is falling...
2. A 106-kg object is initially moving in a straight line with a speed of 51.3 m/s. (a) If it is brought to a stop with a decelera- tion of 1.97 m/s2, what force is required, what distance does the object travel, and how much work is done by the force? (b) An- swer the same questions if the object's deceleration is 4.82 m/s?. 3. To push a 25-kg crate up a 27° incline, a worker exerts a force of...
1) An object is moving in a straight line so that its speed is
doubling every 5 seconds. The acceleration of the object (in
m/s2)is
A) 0.20 B)0.40 C)2.50 D) 5.00 E) constant, but it is none of the
values listed F) constant, but the value is not known without the
initial velocity G) changing
2)Multiple select
astronomy
Incorrect Question 1 0/ 1 pts In class I showed how to change the units of the Hubble constant from km/s per million light years into sec-1. I claimed that one over this number gave the number of seconds since all the galaxies traced back to being on top of one another. This reasoning is only valid if the speed of any individual galaxy was ___over the entire time of flight. first increasing, then decreasing later constant first decreasing,...
4. In Chapter 1, we showed that for an object moving along a straight line with position function s(t), the object's "average velocity on the interval [a, b is given by s(b) s(a) More recently, in Chapter 4, we found that for an object moving along a straight line with velocity v(t), the object's “average value of its velocity function on [a, bl" is v(t)dt Are the 'average velocity on the interval a, b" and the "average value of its...
Question 3 10 pts A skater slides at a constant speed in one straight line on a level track. She then allows herself to coast to a complete stop, which takes 35 m to stop completely. What was her initial velocity? (Use coefficient of kinetic friction = 0.030; g = 9.81 m/s2) O None of the provided answers are correct more information is needed to answer the question 6.2 m/s 7.9 m/s 4.5 m/s 4.8 m/s 2.4 m/s
Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking garage on planet Earth, 19 m above the ground below. For reasons that are unknown to us, they simultaneously throw pebbles off the deck, each at the same speed of 15 m/s. Kirk throws his up at an angle of 45 degrees above the horizontal, Spock throws his perfectly horizontally, and McCoy, in a fit of pique, throws his straight down toward the ground....
Question 1 1 pts Which one of the following statement is correct about the stars with mass equal to 10% of the solar mass? they are the most common type of Cepheid variable stars objects of 10% of the solar mass cannot be stars all stars of that mass, no matter when they were formed, are still on the main sequence of HR diagram. at the end of their evolution they will become neutron stars at the end of their...
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