ew it now.S)SearchKhan AcademyDonate MeganNGSS.HS: HS-PS2-1, HS-PS2.A.1Google ClassroomMicrosoft TeamsIdentify the true statements.2Choose all answers that apply:AIf an object is accelerating, it must be experiencing a nonzero ΣFIf an object is remaining at rest, it must be experiencing zero ΣỄIf an object is moving, it must be experiencing a nonzero ΣỄQ SearchRelated contentNewton's First LowNewton's first lawC2 of 4Skip

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Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter2: Newton's Laws

Section: Chapter Questions

Problem 9Q: (Indicates a review question, which means it requires only a basic understanding of the material to...

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(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . During 200-meter and 400-meter races, runners must stay in lanes as they go around a curved part of the track. If runners in two different lanes have exactly the same speed, will they also have exactly the same centripetal acceleration as they go around a curve? Explain.
The CERN particle accelerator is circular with a circumference of 7.0 km. (a) What is the acceleration of the protons (m=1.671027kg)that move around the accelerator at 5of the speed of light? (The speed of light is v=3.00108m/s .) (b) What is the force on the protons?
You are at a red light in your car. The red light turns green, and you take your foot off the brake and step on the gas pedal, without turning the steering wheel. The speedometer changes from 0 to 20 mph in 3 seconds. In those 3 seconds, did the car change velocity? Is that an acceleration? Now, at a constant speed of 20 mph, you make a right turn. Is that an acceleration?
How fast would a 6.0 m-long sports car have to be going past you in order for it to appear only 5.5 m long?
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . The following are speeds and headings displayed on a GPS receiver, (Heading gives the direction of motion based on north = 0°, east = 90°, south = 180°, etc,) In each case, indicate whether the receiver was accelerating during the time between the displays and, if it was, describe in what way the receiver was accelerating. (a) Initially: 60 mpht 70°; 5 seconds later: .50 mph, 70°. (b) Initially: .50 mph, 70°; 5 seconds later: 70 mph, 70°. (c) Initially: 60 mph, 70°; 5 seconds later: 60 mph, 90°.
Dimensions What frame or frames of reference do you use instinctively when driving a car? When flying in a commercial jet?
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) Scenes in films or television programs sometimes show people jumping off moving trains and having unpleasant encounters with the ground. If someone is on a moving flatbed train car and wishes to jump off, how could the person use the concept of relative speed to make a safer dismount?
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) - A swimmer heads for me opposite bank of a river. Make a sketch showing the swimmer's two velocities and the resultant velocity.
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . What is centripetal acceleration? What is the direction of the centripetal acceleration of a car going around a curve?
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . A basketball player shoots a Free throw. Make a sketch showing the basketball's velocity just after the ball leaves the player's hands. Draw in two components of this velocity, one horizontal and one vertical. Repeat the sketch for the instant just before the ball reaches the basket. What is different?
An astronomy textbook is to be dropped from a tall building on Earth. One second after dropped, what are the textbooks speed, velocity, and acceleration? After 2 seconds? After 3 seconds? The book hits the ground; what are the books speed, velocity, and acceleration?
Try the following experiment away from traffic: where you can do it Safely. With the car VOU are driving moving slowly on a Straight, level road, shift the transmission into neutral and let the car coast. At the moment the car comes to a complete slop, step hard on the ln.ike and notice what you feel. Now repeal I he same experiment on a fairly gentle, uphill slope. Explain the difference in what a pet son tiding in the car feels in the two cases. (Brian Popp suggested the idea for this question.)

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