Question T of7 A car is travelling anticlockwise around a curve of radius 31 m. At t= 0, the car is moving north with a speed of 25 m/s. At t: 5.0 s, the speed of the car is 10 m/s. The angular acceleration of the car is rad/s2. The centripetal acceleration at t: 0 is m/s2 and at t: 5 s it is m/sZ. The total acceleration of the car at t: Dis Question 2 of7 A centrifuge accelerates uniformly from rest to 7 000 rpm in 7.3 s. The centrifuge makes rotations while accelerating. A particle which is T? cm from the centre of the centrifuge experiences gs of acceleration when the centrifuge is at full speed (i.e. express the acceleration in multiples ofg). Question 3 of? A 2.5 kg, 39 cmrdiameter solid disk is spinning at 286 rpm. The magnitude ofthe minimum friction force which a brake should apply to the rim in order to bring the disk to a halt in 6.9 s is N. Answer this question using the angular momentum form of Newton Question 4 of7 Click to see additional instructions Astronomers predict that, in about 5 billion years, the sun will become a white dwarf star, with a density ofabout 5 x 105 that of its current density. If the sun does not lose any mass in the process, then its rotation period will change from 30 days to minutes. (Assume the sun has uniform density, and the dwarf star also has uniform density.)