Question

1. Usain Bolt sprints along the track, with his feet pushing down and behind him. Therefore...

1. Usain Bolt sprints along the track, with his feet pushing down and behind him. Therefore the track actually pushes Usain Bolt along the track. Group of answer choices True or False

2.You study two objects in motion, Object J and Object S. Each object has its own velocity graph, with same time and velocity scales. The slope of each graph is positive, upward and to the right  ⁄ but Object J's tilt angle is only 10º and Object S's tilt angle is quite steep, 85º. Which statement below is unquestionably correct?

Hint: make two careful sketches on your scratch paper.

Group of answer choices

Object J gains a smaller amount of speed per second than S.

Object S is moving to the right.

Object S is moving at higher speed than Object J.

Object J is moving to the left.

3. The y-coordinate equation for a free-fall trajectory,

exemplifies an essential part of what scientists want to do:

Group of answer choices

control the discussion of ideas.

predict the future state of a physical system.

elect Galileo or other professor to an informal political office, King of All Sciences.

construct a history of mathematical understanding.

4. As the first actions in a basic study of motion in two dimensions, a scientist must set up a coordinate system and decide on ________.

Group of answer choices

whether to follow Galileo or Aristotle

an appropriate distance scale, meters vs. light years vs. nanometers

the best strategy to use, mathematics vs. music vs. pure logic.

which came first, the chicken or the egg

5.An object with increasing acceleration, like the one we studied in lecture, does not in itelf, provide a true distance rectangle or distance triangle on its velocity graph. However, the area under the graph can be calculated, like in the film "Hidden Figures," by using

Group of answer choices

the principle of the tortoise and the hare, i.e., average speed.

circular or parabolic arcs, just as the famous Euler Method uses.

Euler's Method, which Katherine Johnson invented.

many narrow trapezoids made of a rectangle and a triangle.

6.We say that the changes in velocity of the two skateboarders are unequal in size when

Group of answer choices

their Δv vectors are equal in size and the same direction.

their masses are not the same.

Newton’s third law says their interaction forces are the same size.

the time formula, d = (1/2)gt2, is reversible.

7. The moon exerts a number of Newtons of gravitational force on Earth: F(moon →Earth)

The Earth exerts a number of Newtons of gravitational force on the moon: F(Earth →moon)

These two forces have the following relationship....

Group of answer choices

neither

both equal in size and opposite in direction

equal in size

opposite directions

8. Geosynchronous communication satellites orbit Earth every 24 hours, and they all orbit at the same altitude.

9.

You observe a coin at position x1 with velocity v1 = 1.6 m/sec away from you, moving toward point x2 on the x-axis, as shown.

The coin's mass is m = 0.005 kg.

There is a friction force of size f = 0.021 N that acts on it.

Calculate the stopping acceleration on the coin.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. The equation Δ?=?0?+0.5??2Δx=v0t+0.5at2 Can be used to describe an object's position x. When can this...
1. The equation Δ?=?0?+0.5??2Δx=v0t+0.5at2 Can be used to describe an object's position x. When can this equation be applied? Group of answer choices: A. Displacement must be constant B. The object must be acted on by no more than one force C. Velocity must be constant D. Acceleration must be constant E. The force acting on the object must be gravity 2. If a vector A has a y component equal to |?|cos?|A|cos⁡θ, then the angle ?θ is the angle...
ch 6 1: It is generally a good idea to gain an understanding of the "size"...
ch 6 1: It is generally a good idea to gain an understanding of the "size" of units. Consider the objects and calculate the kinetic energy of each one. A ladybug weighing 37.3 mg flies by your head at 3.83 km/h . ×10 J A 7.15 kg bowling ball slides (not rolls) down an alley at 17.5 km/h . J A car weighing 1260 kg moves at a speed of 49.5 km/h. 5: The graph shows the ?-directed force ??...
do all five questions Question 1 20 pts Ignoring the effects of air resistance, if a...
do all five questions Question 1 20 pts Ignoring the effects of air resistance, if a ball falls freely toward the ground, its total mechanical energy Group of answer choices increases remains the same not enough information decreases Flag this Question Question 2 20 pts A child jumps off a wall from an initial height of 16.4 m and lands on a trampoline. Before the child springs back up into the air the trampoline compresses 1.8 meters. The spring constant...
answer all questions 3.13.6 Question 110 pts A 319 kg motorcycle is parked in a parking...
answer all questions 3.13.6 Question 110 pts A 319 kg motorcycle is parked in a parking garage. If the car has 35,494 J of potential energy, how many meters above ground is the car? Report your answer to 1 decimal place. Please do not include units or the answer will be marked incorrect. Flag this Question Question 210 pts A box sitting on the top of a hill has 252 J of potential energy. If the hill is 279 meters...
8 through 10 done please!! 3.13.6 Question 110 pts A 319 kg motorcycle is parked in...
8 through 10 done please!! 3.13.6 Question 110 pts A 319 kg motorcycle is parked in a parking garage. If the car has 35,494 J of potential energy, how many meters above ground is the car? Report your answer to 1 decimal place. Please do not include units or the answer will be marked incorrect. Flag this Question Question 210 pts A box sitting on the top of a hill has 252 J of potential energy. If the hill is...
just do questions 5 through 10 3.13.6 Question 110 pts A 319 kg motorcycle is parked...
just do questions 5 through 10 3.13.6 Question 110 pts A 319 kg motorcycle is parked in a parking garage. If the car has 35,494 J of potential energy, how many meters above ground is the car? Report your answer to 1 decimal place. Please do not include units or the answer will be marked incorrect. Flag this Question Question 210 pts A box sitting on the top of a hill has 252 J of potential energy. If the hill...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT