An advertisement claims that a certain 1200kg can accelerate from rest to a speed of 25 m/s in a time of 8s. what average power must the motor develop to produce this acceleration if the car is going up a 20 degree incline? give your answer in watts. ignore friction.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?