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Assignment 1 BDA20103

Prepared by

Nor Azali Bin Azmir

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Question No 1

Car B turns such that its speed is increased by at!B " 0#$et! m%s2&

'here t is in seconds# () the car starts )rom rest 'hen&

determine the magnitudes o) its *elocity and acceleration'hen the arm AB rotates# Neglect the size o) the car#

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Question No 2+he motor at   C  pulls in the cable 'ith an acceleration ac " 3t

2!

m%s2& 'here t is in seconds# +he motor at  D dra's in its cable

at  D dra's in its cables at aD " $ m%s2# () both motors start at

the same instant )rom rest 'hen d " 3m& determine a! thetime needed )or d " 0& and b! the *elocities o) bloc,s A and B

'hen this occurs#

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Question No 3

+he crate has a mass o) 1$0 ,g and rests on a sur)ace )or 'hich

the coe))icients o) static and ,inetic )riction are -s " 0#3 and -,

" 0#2& respecti*ely# () the motor . supplies a cable )orce o) / "t2 20! N& 'here t is in seconds& determine the po'er

output de*eloped by the motor 'hen t " $ second#

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Question No At the instant the cable )ails& the 200lb crate is tra*eling up the

plane 'ith a speed o) 1$ )t%s# Determine the speed o) the

crate 2 s a)ter'ard# +he coe))icient o) ,inetic )riction bet'een

the crate and the plane is -, " 0#20#

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Question No $+he cue ball A is gi*en an initial *elocity v A!1 " $ m%s# () it ma,es

a direct collision 'ith ball B e " 0#!& determine the *elocity

o) B and the angle 4 5ust a)ter it rebounds )rom the cushion at

C e’  " 0#6!# 7ach ball has a mass o) 0# ,g# Neglect the size o) 

each ball#