A robot arm moves so that P travels in a circle about point B, rvhich is not moving. Knowing that P starts from rest, and its speed increases at a constant rate of 10 mm/s^2. determine (a) the rnagnitude ol the acceleration when t : 4 s. (b) the time for the magnitude of the acceleration to be 80 mm/s^2

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

How can you increase the strength of an electromagnet?