An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s² in a straight line until it reaches a speed of 18 m/s. The vehicle then slows at a constant rate of 1.2 m/s² until it stops. (a) How much time elapses from start to stop? (b) How far does the vehicle move from start to stop? (a) Number i (b) Number i Units Units

In the given equation, v = At² + Bx, 'v' is the velocity, 'x'is displacement, and 't'is the time. Then the dimensions of A and B are ; B= LT-1 b) A = LT¯1 ; B= T¯1 B = LT-2 ; B = T¯1 a) A = T ; c) A = T-1 d) A = LT-3 O b O a

If an average-size man jumps from an airplane with an open parachute, his downward velocity t seconds into the fall is v(t) = 20(10.2) feet per second. (a) Use functional notation to express the velocity 3 seconds into the fall. Calculate it. ft per sec (b) Explain how the velocity increases with time. Include in your explanation the average rate of change from the beginning of the fall to the end of the first second and the average rate of " change from the fourth second to the fifth second of the fall. This answer has not been graded yet. (c)-Find the terminal velocity. ft per sec (d) Compare the time it takes to reach 99% of terminal velocity here with the 25 seconds it took a skydiver with his parachute closed to reach 99% of terminal velocity in Example 2.1. On the basis of the information we have, which would you expect to reach 99% of terminal velocity first, O feather feather or a cannonball? O cannonball Need Help? Read It

A 7760 kg space probe, moving nose-first toward Jupiter at 73.9 m/s relative to the Sun, fires its rocket engine, ejecting 83.0 kg of exhaust at a speed of 248 m/s relative to the space probe. What is the final velocity of the probe? Number Units