An astronaut in outer space is twirling an object on a string in uniform circular motion. Instantly, the string is cut. The object: a. Suddenly Stops b. Moves in a straight line tangent to the circle c. Continues to move in a clircle but slows down and stops d. Flies radially outward from the circle

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.

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

A toy racecar races along a circular race track that has a radius of 19 meters. The racecar starts at the 3-o'clock position of the track and travels in the CCW direction. Suppose the car has swept out 2.25 radians since it started moving. a. The racecar is how many radius lengths to the right of the center of the race track? radius lengths Preview b. The racecar is how many meters to the right of the center of the race track? meters Preview c. The racecar is how many radias lengths above the center of the race track? radius lengths Preview d. The racecar is how many meters above the center of the race track? meterss Preview

In a total solar eclipse, it is possible for the moon to momentarily cover the sun for an observer on the Earth's surface since: a) the angle that covers the diameter of the moon is the same that covers the diameter of the sun during the eclipse. b) the tangential acceleration of the moon and the sun is the same while the eclipse occurs. c) the length of the arcs corresponding to the diameters of the sun and the moon are equal during the eclipse. d) the angular speed of the moon and the sun is equal while the eclipse occurs.

Former prince Harry's child is riding on a dangerous, old-fashioned, playground merry-go-round which completes one revolution every 8.36 seconds. The boy is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleration of the child? a) 3.21 m/s^2 b) 1.78 m/s^2 c) 2.63 m/s^2 d) 2.04 m/s^2 e) 3.97 m/s^2

A race car starts from rest on a circular track of radius 632m. The car’s speed increases at the constant rate of 0.690m/s^2. At this point where the magnitude of the centripetal and tangential accelerations are equal, find the following A) the speed of the race car m/s B) the distance traveled M C) The elapsed time s

Consider a car moving on a circular track with constant speed. Which of the following statements is incorrect?  a) The distance to the center of the circle does not vary  b) The vehicle retains the magnitude of its speed  c) The vehicle has no acceleration d) The vehicle has acceleration, but its speed is constant  e) Centrifugal acceleration is zero

A car with a constant speed of 95 km/h enters a circular flat curve with a radius of 0.5 km. The friction between the road and the car's tire can supply a centripetal acceleration of 1.35 m/s². What is the acceleration the car need to remain in this curve regardless of its acceleration of 1.35 m/s²? a) 2.39 m/s² b) 1.74 m/s² c) 1.35 m/s² d) 1.39 m/s² V₁ = V + at лd²h V= C=d F = ma ac r x=x+(+v₁)t +mgh+Fyud F r

Question #4