MOMENTUM
The only type of objects that have momentum.
THOSE IN MOTION
Quantity depending upon both force and time.
IMPULSE
Between two variable masses colliding, identify which one experiences the greatest force of impact.
NEITHER (BOTH ARE THE SAME)
Two equal mass carts roll towards each other on a level, low-friction track. One rolls rightward at 4 m/s and the other rolls leftward at 2 m/s. After the collision, they couple and roll together with a speed of...
1 m/s
The direction of the momentum vector must match the direction of this measurement.
VELOCITY
Word describing an elastic collision involving both a direction change and speed change.
REBOUND
The resulting value that will vary in a collision between two variable masses.
ACCELERATION
A 10-N force is applied to a 5-kg ball to change its velocity from +10 m/s to +5 m/s. This impulse causes the momentum change of the ball to be...
25 kg*m/s
A relatively large force acting for a relatively long time on a relatively small mass will produce a relatively ________ velocity change.
LARGE
An interaction between two objects that have made contact with each other.
COLLISION
Type of collision in which momentum will not be conserved between two objects.
WHEN NET EXTERNAL FORCES ARE PRESENT
A 1-kg ball moving at 10 m/s strikes a wall and rebounds in the opposite direction with a speed of 4 m/s. If the impulse occurs for a time duration of 0.01 s, then the average force acting upon the ball is...
1400 N
If the mass of a system is doubled while its velocity stays the same but its time is a quarter of its original experience, how will this affect the force it experiences?
8X THE FORCE
A collection of two or more objects.
SYSTEM
Type of category under which most collisions fall.
INELASTIC
A 5.0-kg object is moving forward with a speed of 10 m/s. The object then encounters a force of 3 N for 10 seconds in the direction of its motion. The object then collides head-on with a wall and heads in the opposite direction with a speed of 3.0 m/s. Determine the impulse delivered by the wall to the object.
95 N*s
Type of situation under which momentum is conserved between two objects.
CLOSED or ISOLATED SYSTEM
A rapid increase in volume and release of energy in an extreme manner, despite which momentum will still be conserved.
EXPLOSION
The reason that someone anticipating a collision with their body would move in the direction of the velocity of the colliding object.
INCREASING THE TIME OF IMPACT DECREASES THE FORCE EXPERIENCED
A 3-kg physics cart is moving forward with a speed of 50 cm/s. A 2-kg brick is dropped from rest and lands on the cart. Both objects move together across a horizontal surface. Assuming an isolated system, determine the post-collision speed of the cart and brick.
30 cm/s