3. Toy Train: A toy train pushed forward and released at x0=2.0 m with a speed of 2 m/s. It rolls at a steady speed for 2 s, then one wheel begins to stick. The train comes to a stop at 6m from the point at which it was released. What is the magnitude of the train's acceleration after its wheel begins to stick?

A ball is launched up a semicircular chute with radius 0.35 m in such a way that at the top of the chute, just before it leaves, the ball has a radial acceleration of magnitude 13 m/s^2. (Figure 1) Figure 2R < 1 of 1 ▼ Part A How far from the bottom of the chute does the ball land? ► View Available Hint(s) Value Submit μA Provide Feedback d C Units Previous Answers ?

1. A car starts from position A (0m) and drives in a straight line to position B (20m away from A) in 10 seconds. What is the average speed? Average velocity? 2. A car starts from position A (0m) and drives in a curved line to position B (20m away from A) in 10 seconds. Which is greater, average speed or average velocity? Explain. 3. If a person walks one time around in a circle that has a circumference of 100m in 60seconds, what is the distance traveled? Displacement? 4. In the same situation as above in question 3, what is the average speed? Average velocity?

Helicopter blades withstand tremendous stresses. In addition to supporting the weight of a helicopter, they are spun at rapid rates and experience large centripetal accelerations, especially at the tip. A. Calculate the magnitude (in m/s2) of the centripetal acceleration at the tip of a 3.40 m long helicopter blade that rotates at 240 rev/min. B.  Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s). Vtip/VSound =

No answer text proVided.. You selected this answer. Question 1 0 / 0.4 pts The figure shows an object moving at constant speed in a circular path. What is the velocity of the object at the indicated point? O 0 = v(- cos(0)î + sin(0)ĵ) O i = v(- sin(@)î + cos(8)ĵ) O ū = v(- sin(0)î – cos(0)ĵ) ü = v(sin(0)î + cos(0)Î) O i = v(cos(0)î + sin(0)ĵ)

An object is moving counterclockwise around a circular track at a constant speed of 3 m/s. The track is centered at the origin and has a radius of 1 m. What is the object's acceleration vector when it is at point P shown? y. P -(3플)i ○금3 + (3프) i a = +(9) i m Oa = 0 -(9플)i

2 A new car is tested on a 250-m-diameter track. W S X ommand # 3 So E D C $ 4 888 R F % 5 V T G 6 ▼ Part A B If the car speeds up at a steady 1.4 m/s², how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration? Express your answer with the appropriate units. Provide Feedback At= Value MacBook Air 320 Y Submit Request Answer H & o 7 N HÅ 329 U 8 J → W M Units ( 9 K MOSISO DD ? O O L 1- command P { option + ? 1 1 Review Next > delete retu

6. Which of the following statements is true about nonuniform circular motion? Here are the choices:   The tangential velocity changes in direction but not in magnitude.   In a circular path, radial acceleration is directed toward the center of the circle.   The tangential acceleration in addition to radial acceleration is present due to the changes of speed.   The body moves with constant speed.

Car A rounds a curve of 107-m radius at a constant speed of 53 km/h. At the instant represented, car B is moving at 90 km/h but is slowing down at the rate of 3.0 m/s². Determine the velocity and acceleration of car A as observed from car B. Your answer is partially correct. Answer: VA/B = aA/B = 107 m 14.72 0 B CIDI i + -25 i + i 3 j) m/s j) m/s²

A hawk flies in a horizontal arc of radius 15.2 m at a constant speed of 5.4 m/s. Find its centripetal acceleration. Answer in units of m/s 2 .   It continues to fly along the same horizontal arc but increases its speed at the rate of 1.61 m/s 2. Find the magnitude of acceleration under these new conditions. Answer in units of m/s2