Please answer numbers 8, 9, 10 B. Essay. Write your answers in less than 100 words.5. When is distance the same as displacement?6. Differentiate speed from velocity.7. Which of the three graphs below show constant velocity and constant acceleration? Explain.dt8. Why is it important to assume that the air resistance is zero when you are calculating thevelocity of a freely falling object?C. Problem solving. Show your solutions step-by-step.9. Two cars are travelling at 50 km/hr but are 20 meters apart. Car A, which is ahead of Car B,decelerates and fully stops 10 seconds after application of the brakes. The driver of Car Bsees the red brake lights of Car A so he also decelerates to full stop 5 meters behind Car A.What is the deceleration of Car B?10. A free-falling ball is dropped from a height of 12 meters. What will be its final velocity justbefore it hits the ground?

Answered: Image /qna-images/answer/e7ad18d0-7fc4-4980-a647-dd9605810080.jpg

Answered: 5. When is distance the same as…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter1: The Study Of Motion

Section: Chapter Questions

Problem 7C

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Work this problem out on paper and scan it or take a photo of it and upload the scanned image/photo here in either pdf, docx, png, or jpg format.A rocket accelerates from rest at a rate of 70 m/s^2.(a) what is the rocket's speed after it accelerates for 30 seconds?(b) how long does it take for the rocket to reach a speed of 7,250 m/s?
1.What is the graph showing? Speed, Velocity, Acceleration, Deceleration? 2.How did you know? 3.Explain what is happening in the graph. 4.Is the motion constant? How do you know?
Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year. (a) What distance does it move in 1 s at this speed? (b) What is its speed in kilometers per million years?
A student writes, "A bird that is diving for prey has a speed of -10 m / s." What is wrong with the student's statement? What has the student actually described? Explain.
A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250 m. (a) How long did the acceleration last? (b) Calculate the acceleration.
1. Using the terms slope, acceleration, and velocity, explain how you know the rocket launched in the graph above is speeding up. 2. What are the units for the slope of a velocity-time graph? 3. What does the slope of a velocity-time graph represent? 4. What are the units for the area of an acceleration-time graph? 5. What does the area of an acceleration-time graph represent?
A car in stop-and-go traffic starts at rest, moves forward 20 mm in 8.0 ss, then comes to rest again. The velocity-versus-time plot for this car is given in the figure(Figure 1). What distance does the car cover in the first 4.0 seconds of its motion? What distance does the car cover in the last 2.0 seconds of its motion? What is the constant speed V that characterizes the middle portion of its motion?
A car accelerates from rest at 4 m/s2. What is the velocity of the car after 4 seconds? After 4 seconds, the car applies the brakes and comes to a full stop after 2 seconds. What is the acceleration of the car and what is the braking distance?
An astronaut chillin’ on the moon drops her bag of Takis (doh!). g on the moon is 1.6 m/s/s. The Takis fell for 1.23 seconds. (a) How far did they fall? (b) What was their final velocity?
1. Galileo released two bodies of different masses from the Pisa tower to test his theory. Knowing that the height of the tower is 52 m. A) Indicate in the image the characteristics of the movement of a body and deduce its type of movement. B) Write the equations of motion corresponding to the movement of the body. C) Calculate the time it takes to reach the ground. D) How fast will they arrive? Interpret the results. 0.5p E) What speed do we carry halfway? Interpret the results. F) With what speed should we pull up so that the body reaches the ground in 10s. G) Selected and graphic corresponding to the previous movement. Justify your answer.
You decide to flip a coin to determine whether to do your physics or English homework first.The coin is flipped straight up. (a) If the coin reaches a high point of 0.25 m above where youreleased it, what was its initial speed? (b) If you catch it at the same height as you released it,how much time did it spend in the air? Hint: The time it takes the ball to rise equals the time ittakes to fall.
NASA is launching a rocket into space from Earth. This particular rocket burns its fuel for 5 minutes and then turns off its engines. At this point, the rocket keeps floating along through space at a speed of 10 km/s. What is the rocket’s average acceleration during these first 5 minutes? Part 2: How far did the rocket travel during the first 5 minutes? Part 3: The Moon is approximately 3.8.105 km from Earth. At its final speed, how long will it take the rocket to reach the Moon? Part 4: The star nearest to us, called Alpha Centauri, is 4.1.1013 km away. Could this rocket get a man to Alpha Centauri before he dies of old age? (This is a real obstacle to NASA’s plans of exploring other solar systems than our own!) Part 5: The rocket is half way to the Moon when its pilot suddenly notices he forgot his camera! He radios a second rocket crew on Earth and tells them to bring his camera and meet him on the Moon when he lands. Unfortunately, the second rocket can only…

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