The discussion revolves around solving a physics problem involving a speeder and a cop car, where the cop accelerates from rest at 9 km/h² until reaching a maximum speed of 170 km/h. The participants derive equations to find the time it takes for the cop car to catch the speeder, ultimately concluding that the total time required is approximately 26.79 seconds. The conversation also touches on related problems involving projectile motion and tangential acceleration, emphasizing the importance of understanding kinematic equations and conversions between units.
PREREQUISITESStudents studying physics, particularly those focusing on kinematics and dynamics, as well as educators looking for examples of real-world applications of these concepts.
anglum said:so then for the horizontal distance it is just 17 cos 50 (2.62)?
anglum said:014 (part 1 of 2) 10 points
The speed of a point on a rotating turntable,
which is 0.131 m from the center, changes at a
constant rate from rest to 0.958 m/s in 1.95 s.
At t1 = 1.6 s, find the magnitude of the
tangential acceleration. Answer in units of
m/s2.
015 (part 2 of 2) 10 points
At t1 = 1.6 s, ¯find the magnitude of the total
acceleration of the point. Answer in units of
m/s2.
anglum said:ok 2 more problems if u don't mind?
#1
a rotating cylinder 10 miles long and 4.9 miles in radius is in space...
acceleration of gravity is 9.8m/s squared
what angular speed must the cylinder have so that the centripetal acceleration at its surface equals the free fall acceleration on earth?