A70.0-kg person rides in an elevator while standing on a scale. the scale reads 896 n. what is the magnitude and direction acceleration of the elevator?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)

Someone plz me out ill give 30pts match the vocabulary word with the correct definition. 1. obstacles or difficulties that prevent exercise -regular exercise 2. conditioning that strengthens the heart, lungs, and blood vessels -obese 3. conditioning that strengthens specific muscles -flexibility 4. when a person is very heavy or overweight -muscular fitness 5. conditioning that the joints move better -physical fitness 6. a measurement of how healthy a person is in three main areas limitingfactors 7. a plan to exercise every week -cardiovascular fitness

Aparticle's position is given by x = 6.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".