Question

1- A car traveling 10 miles/h is able break and stop in 12 meters. When the car's speed increases to 20 miles/h, what is the distance required to stop the car?  m

2-A particle of mass 5 kg starts moving from rest when acted by a time dependent force F(t) = (4 t + 4 ) N.
The position of the particle at time t = 1 s is  m.

3-The kinetic energy of a 500 kg car that moves with a speed of 15 miles/h is  in units of  ---Select--- N calories J N/m kg m/s^2

4-(a) With what speed should an angry bird be projected by a slingshot at an angle of 45 degrees, to hit a pig on a hill that is at a horizontal distance 240 m and elevation 30 m?
(b) What is the duration of bird's flight ?
(c) With what horizontal velocity is the bird hitting the pig?

Answer 1