Answer item no 1 only.

Provide solution and explanation. Thank you.

A scientist was able to record the motion a UFO flying above the ground. The position of the UFO followed the equation F = (30.0 m/sz)t2\" [100 m (2.50 m/53)t3]j'. (a) What is the position vector of the UFO at t = 0 and at t = 15.0 s? (b) What are the average velocity and average acceleration of the plane over that duration? (c) What is the acceleration ofthe UFO at t = 15.0 s? In long and straight highway, a bus initially at rest starts to accelerate at a constant rate of 2.50 m/sz. At the same instant, a car at some distance behind the bus, initially traveling at 15.0 m/s also starts to accelerate at 4.00 01/52. The bus was overtaken by the car when its speed reaches 30.0 m/s. (a) Initially, how far is the car behind the bus? (b) How fast is the car moving when they are abreast? dAxlzP 2.50 m/s2 . = _). vb = 30.0 m/s 4.00 m/52 \"*b 0 # U\": = 15 m/S x1 x2 x3 4Ax1gD