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Questions in physics

[Answered] A sprinter with a mass of 80 kg accelerates from 0 m/s to 9 m/s in 3 s. What is the sprinter's acceleration?

[Answered] You lift a 45-newton bag of mulch 1.2 meters and carry it a distance of 10 meters to the garden. How much work was done?

[Answered] What is kinetic energy?

[Answered] Given that 1 joule = 1 newton × 1 meter and 1 volt = 1 joule per coulomb, show that the units newtons/coulomb and volts/meter are equivalent.

[Answered] A space traveler leaves Earth for 10 years at [tex]0.85c[/tex]. According to an observer on Earth, how much time has passed? Please show your work.

[Answered] What property does matter have that energy does not?

[Answered] What kind of molecule is water?

[Answered] Solve for \( m \) in the equation \( f = ma \).

[Answered] The weight of an object is the product of its mass, [tex]m[/tex], and the acceleration of gravity, [tex]g[/tex] (where [tex]g = 9.8 \, \text{m/s}^2[/tex]). If an object’s mass is [tex]m = 10 \, \text{kg}[/tex], what is its weight?

[Answered] The mass of a subway car and its passengers is 40,000 kg. If its acceleration as it leaves the station is 0.9 m/s², what is the net force acting on it?