Một người đi xe đạp chuyển động thẳng đều với vận tốc 15km/h tính quãng đường người đó đi được sau 180 phút

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

If anyone who can me with this hw? i would really appreciate it