PHYS 20-A 170 g hockey puck sliding at 25 m/s

PHYS 20-A 170 g hockey puck sliding at 25 m/s

1.A 170 g hockey
puck sliding at 25 m/s slows to a speed of 10 m/s in a distance
of 7.5 m. Determine the force of
friction causing the puck to slow. Show all work.

2. A toy company
hires you to construct a device that uses a small spring to
launch 15 g foam pellets. The spring requires an
average force of 5.70 N to compress it
1.30 cm. Determine the speed of
one of the foam pellets as it leaves the spring. Show all work.

3. A spring
having a constant of 44 N/m is initially compressed 4.0 cm. The spring is then
compressed another 5.0 cm in a time
of1.4 s. Determine the work done
to compress the spring from 4.0 cm to 9.0 cm. Show all work.

=”box-sizing:>

PHYS 20-A 170 g hockey puck sliding at 25 m/s
PHYS 20-A 170 g hockey puck sliding at 25 m/s