Reference no: EM134767

Question1

A bank robber travelling at 75 mi/hr in an escape car suddenly sees a barricade 150 meters ahead. The robber slams on the brakes following a 0.75 second delay (the driver's reaction time). After the brakes are applied, the car deaccelerates at 4.2 m/s2. Will the car hit the barricade and, if so, what is its speed?

Question2

A point charge Q= 4.60 uC is held fixed at the origin. A second point charge q=1.20 uC with mass of 2.80 * 10^-4 is placed on the x-axis 0.250 m away from the origin. The second point charge is released from rest. What is its speed with its distance from origin is

(i) .500 m (ii) 5.00 m (iii) 50.0 m