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If the velocity and acceleration are having the same sign then the magetude of speed increases with time. But If the velocity and acceleration are havinf opposite signs then the magnetude of speed decreases with time.
rate if right

find the average velocity of a projectile between the instants it crosses half the maximum height . it is projected with a speed u and at an angle theta with the horizontal

can experts or any one answer

just read HC verma throughly and and u will get through physics . because hc verma makes ur conceptual s perfect.rate if useful

please tell

where can i get practice sheets of mechanics and thermodynamics any site?????????

ganesha do u have arihant mechanics volume one
then check that problem on page 125 . level 2 problem no 18. it is absolutely correct

no ONE CAN ANSWER IT ???????????????????????????????
I M SUPRISED

for IIT BEst is the BRILLIANT TUTORIALS

The distance between the two moving particles is a. if v be their relative velocity and A and B be the components of along v along and perpendicular to a . the timewhen they are closest to each other are
a)aA/v²
b)aB/v²
c)av/A²
d)av/B²

be clear in ur question

ya we must first check what we an solve and then attempt the question of the topic which we are perfect . this may consume time but will be benefited twice the amount due our fater solving of problems

plz rate if useful

A tile slides off a roof inclined at an angle 37 degree ti=o the horizontal with a speed of 5m/s . how far does it horizontally travel in reaching the ground 20m below

a)
b)
c)
d)

i think u are wrong

a particle of mass 10^-2kg is moving along the positive x axis under the influence of a force F(x) = -k/2x² where k=10^-2Nm². at time T=0 it is at x=1.0m and its velocity is v=0 . its velocity when it reaches x=0.5m
a)0.5m/s along +xaxis
b)1m/salong +x axis
c)0.5m/s along - xaxis
d)1m/s along - xaxis