Homework Statement
A bullet of mass 1.9×10^−3 kg embeds itself in a wooden block with mass 0.991kg
which then compresses a spring (k= 100N/m ) by a distance 4.5×10^−2m before coming to rest. The coefficient of kinetic friction between the block and table is 0.55.
a) What is the initial speed...
The actual answer to the question is 5.5m/s but I just guessed it. BTW I was using an interactive website so it told me my answer was wrong. Thanks for trying to help:)
Homework Statement
A horizontal force of magnitude F = 150 N is used to push a box of mass m = 18 kg from rest a distance d = 8 m up a frictionless incline with a slope q = 32°.
a, b. and c I already have done
d) How fast is the box moving after this displacement? [Hint: Work-energy...