center of mass
the center of mass of a uniform meter stick is located at this position
what is 0.50 m?
if distance between two masses is cut in half, gravitational force changes by this factor.
what is 4 times larger?
impulse is equivalent to change in this quantity.
what is momentum?
momentum is conserved only when net external forces is this.
what is zero?
a 2kg mass is at x=1m and a 4kg mass is at x=5m. find the center of mass
what is 3.67 m?
a planet has radius R and mass M. another planet has radius 2R and mass 8M. find the surface gravity of the second planet in comparison to the first.
what is twice as large?
a 0.5kg object moving at 10m/s stops in 0.2s. find the magnitude of the average force.
what is 25N?
two carts stick together. this type of collision is called…
what is perfectly inelastic?
a system’s center of mass moves with constant velocity when the net external force is this quantity.
what is zero?
a satellite orbits Earth at radius r with speed v. if the orbital radius doubles, the new orbit speed becomes this multiple of v.
what is v/(sqrt2)?
a force increases from 0 to 20N over 4s. find the impulse.
a 2kg object at 6m/s collides elastically with a 1kg object at rest. this quantity is conserved in addition to momentum.
what is kinetic energy?
a 3kg object is at (0,0) and a 6kg object is at (4,2). find the x-coordinate of the center of mass
what is 2.67?
a projectile is launched upward from Earth. as it rises, its GPE increases while its kinetic energy changes in this way (assuming negligible air resistance).
what is decreases?
a 3kg object experiences impulse of 18Ns. if initial velocity is 2m/s, final velocity is…
what is 8m/s?
a 3kg and 5kg object move toward each other at equal speeds and stick. final velocity direction depends on this.
what is larger initial momentum?
a uniform rod of length L has mass M. a point mass M is attached to one end. find the center of mass measured from the attached end.
what is L/4?
two satellites orbit the same planet. one is twice as far from the center as the other. the farther satellite’s orbital speed is…
what is 1/(sqrt2) times as large?
a 1200kg car collides and rebounds with the same speed magnitude. find the magnitude of momentum change if speed is 15m/s.
what is 36,000kgm/s?
a 2kg object moving right at 8m/s collides with a 3kg object moving left at 4m/s. they stick together. find the final velocity.
what is 0.8m/s to the right?