Transcript Slide 1 - Fort Bend ISD

How far will a 4320 N car with a
momentum of 345 kgm/s roll in 22 sec?
If you want to increase the velocity of an
object of mass 875 kg by 35 m/s how long
must you apply a 43 N force.
Two cars hit each other and their bumpers
stick together. If the first car weighs 7430 N
and was traveling at 15 km/hr and the
second car weighs 6460 N and was
traveling the opposite direction at 95 km/hr
when they hit, how far will they roll if a
frictional force of 346 N acts on them after
the accident?
A rocket sled on a frictionless track has a
mass of 1.4 X 104 kg. For propulsion, it
expels gases from its rocket engines at a
rate of 10 kg/s at an exhaust speed of 2.5 X
104 m/s. For how long must the engine
burn in order that the sled reach a velocity
of 50 m/s starting from rest? (ignore any
change in mass of the sled as it burns fuel)
Two men (each with a mass of 100 kg) are
on a cart (mass = 300 kg) on a frictionless
track at rest. One man runs to the north and
jumps off at a speed on 5 m/s relative to the
cart. After he jumps the second man runs to
the south and jumps off of the cart with a
speed of 5 m/s relative to the cart. What is
the speed and direction of the cart after both
men jump off.
Tarzan (m = 75 kg) is hanging straight down
from a vine (l = 30 m). A monkey (m = 25 kg)
is going to jump from a nearby tree onto
Tarzan causing him and the monkey to swing
back to an angle of 30o with the vertical.
What was the monkey’s initial horizontal
speed?