The speed limit in a school zone is 40\ \mathrm{km/h}40 km/h (about 25\ \mathrm{mi/h}25 mi/h). A driver traveling at this speed sees a child run onto the road 13\ \mathrm{m}13 m ahead of his car. He applies the brakes, and the car decelerates at a uniform rate of 8.0\ \mathrm{m/ s^2}8.0 m/s 2 . If the driver 's reaction time is 0.25\ \mathrm{s}0.25 s, Assuming a reaction time of 0.50\ \mathrm{s}0.50 s for the driver ,will the car stop before hitting the child?

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?