A car, moving along a straight stretch of highway, begins to accelerate at 0.0239 m/s 2 . It takes the car 70.6 s to cover 1 km.
How fast was the car going when it first
began to accelerate?
Answer in units of m/s

Which sound characteristic is not affected by the relative motion of an object

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force