Units/Equations
The equation for linear momentum is stated as
What is P=mv?
The equation for impulse
What is Impulse=Ft (Force times change in time)?
The law that states the total momentum of an isolated system remains constant if no external forces act upon it.
What is conservation of momentum?
A collision where kinetic energy is conserved.
What is an elastic collision?
A boy of mass 40 kg standing at rest on frictionless ice throws a rock of mass 3 kg at a velocity of 10 m/s. With what velocity does the boy then move?
what is -0.75 m/s?
The units for momentum are
What is kg(m/s)?
A vector quantity representing the change in an object's momentum.
What is impulse?
A piece of dynamite, weighing 1000kg explodes into two pieces where the first piece weighs 415kg and travels with a velocity of 200 m/s. What is the velocity of the second piece.
What is 141.8 m/s?
In this type of collision, the objects stick together after impact.
What is a perfectly inelastic collision?
A 3 kg object moving at 8 m/s collides elastically with a 1 kg object at rest. Find the final velocities of both objects.
What is 12 m/s (1 kg object) and 4 m/s (3 kg object)
Is momentum a vector or a scaler?
What is a vector?
Impulse can be decreased by
What is decreasing the time/force?
An astronaut, floating at rest in space, with mass 80kg throws an object of mass 30kg 8 m/s to the right what direction does the astronaut move with what speed?
What is 3 m/s to the left?
Two carts are heading towards each other. Cart A has a mass of 4 kg and a velocity of 5 m/s. Cart B has a mass of 7 kg and is moving with a velocity of -2 m/s. If the two carts collide perfectly inelastically what is there velocity?
What is .55 m/s.
0.5 kg ball moving at 12 m/s hits a wall and rebounds at 8 m/s in the opposite direction. The contact time is 0.02 s. Find the average force exerted on the ball.
What is 500 m/s?
Linear momentum can be written in terms of Newton's second law as
What is F=p/t?
An object, initially at rest, of mass 3 kg is hit at a speed of 30 m/s the object was in contact with the bat for 0.02 second what is the average force delivered to the object?
What is 4500N
A 10 kg object moving at 10 m/s to the right explodes into two pieces. One piece (3.0 kg) continues moving to the right at 18 m/s. What is the velocity of the second piece?
What is 6.57 m/s?
A soccer ball of mass .7 kg moves with a velocity of 20 m/s towards a tennis ball of mass .1 kg, moving with a speed of -13 m/s, if the collision is perfectly inelastic, what is the velocity of the tennis ball after the collision?
What is 15.875 m/s
A 3 kg cart moving at 12 m/s collides with a 2 kg cart at rest. The collision is partially elastic, and 40% of the initial kinetic energy is lost. Find both carts velocity's.
What is both cart move together with a velocity of 7.2 m/s.
An event where two or more bodies exert strong forces on each other over a short duration, exchanging momentum and energy.
What is a collision?
A baseball of mass 300 g is moving with an initial velocity of 60 m/s, and is then in contact with a bat, where it is hit in the opposite direction, the average force is 780 N, and the contact time is 4 ms; what is the magnitude of the final velocity of the baseball?
What is 49.6 m/s
An object, of mass 15kg explodes into two pieces, one piece, of mass 5kg, travels 30 degrees above the horizontal at a velocity of 12 m/s, what is the angle and direction the other piece was shot at and with what velocity?
What is 30 degrees below the horizontal, at a velocity of 6 m/s?
A basketball, of mass 2 kg and velocity 6 m/s collides perfectly inelastically with a lump of clay, of mass 1 kg and velocity 2 m/s. How much kinetic energy is lost during the collision?
What is 5.33J?
A cannon, of mass 350 kg is initially at rest, then fires a cannonball of mass 50 kg at 800 m/s. What is the recoil of the cannon?
What is -114.28 m/s?