Glancing
In a glancing collision between two billiard balls of equal mass, where one ball is initially at rest and the collision is perfectly elastic, what is the angle between the final velocity vectors of the two balls?
What is 90 degrees
Which of the following fundamentally defines a collision as being 'perfectly elastic' compared to other types of collisions?
What is the total kinetic energy is conserved
What is conserved in an inelastic collision?
What is Momentum
What is the formula for angular momentum?
What is mvr_perpendicular
The impulse experienced by a body is equal to the change in what?
What is momentum
A 2.0 kg ball moving east at 4.0 m/s collides glancingly with a stationary 2.0 kg ball. After the collision, the first ball moves at 2.0 m/s at an angle north of east. What is the magnitude of the total system momentum along the north-south y-axis after the collision?
What is 0.0 kg x m/s
A light ping-pong ball traveling horizontally at speed v strikes a massive, stationary bowling ball head-on. Assuming a perfectly elastic collision, what is the approximate speed and direction of the ping-pong ball immediately after the collision?
In a perfectly inelastic collision, what happens to the two objects in a system?
What is they combine
As the moment of inertia decreases, what happens to the angular momentum?
What is it is conserved
How does force relate to impulse?
What is impulse is the integral of force
Object A m_A = 3.0kg is moving along the x-axis at 6.0 m/s and strikes stationary Object B $m_B = 6.0 kg. After this glancing collision, Object A moves at 3.0 m/s at an angle of 90 degrees relative to its initial path (along the positive y-axis). What is the final x-component of velocity v_Bx of Object B?
What is 3.0 m/s
In a 1D head-on elastic collision, Object 1 (mass m) is moving at velocity +v and strikes stationary Object 2 (mass m). If we observe this same exact collision from a moving reference frame traveling at velocity +v, how would the collision be described?
What is object 2 stops and object 1 moves away at a speed -v
If a ball collides in a head-on elastic collision with an identical ball, what happens to the first ball?
What is Comes to rest
A star collapses under its own gravity to become a tiny, ultra-dense neutron star. Assuming no mass is escaped into space during the collapse, what happens to the star's total angular momentum?
What is its angular momentum stays the same
What is the unit of impulse?
What is kg m/s
A 10 g bullet traveling horizontally at 400 m/s strikes a 1.99 kg block resting on a frictionless surface, deflecting at an angle of 30 from its original path with a reduced speed of 300 m/s. To calculate the exact final speed and direction of the block, which approach must you take?
What is Break components into x and y, and then use the Pythagorean theorem
If you look at a perfectly elastic collision from the Center-of-Mass (COM) reference frame, what is uniquely true about the velocities of the colliding objects before and after the impact?
What is the speed is the same, direction is just opposite
What is the formula for a perfectly inelastic collision?
What is (M_1)(V_1)+(M_2)(V_2)=(M_1+M_2)(V_final)
A person stands perfectly still on a frictionless, stationary turntable holding a bicycle wheel that is spinning rapidly in a horizontal plane. If the person suddenly flips the bicycle wheel upside down (180∘), what happens to the person and the turntable?
What is the person and turntable will start spinning rapidly in the original direction of the wheel's spin to conserve the system's net angular momentum vector.
If a 5 kg block traveling at 2 m/s initially is slowed to a velocity of 1 m/s, what is the impulse?
What is 5
Two identical particles, each of mass $m$, collide glancingly. Particle 1 has an initial velocity v_1 = v_0 and Particle 2 has an initial velocity v_2 = v_0. They collide elastically and Particle 1 is observed moving along the vector (i + j) after the collision. What can be concluded about the final path of Particle 2?
What is it must move along the (i-j) or a direction perpendicular to particle 1's final velocity
Two objects of unequal mass undergo a 1D head-on elastic collision. If you measure the 'velocity of separation' and compare it to the 'velocity of approach' , what is the unique relationship between them?
In a closed system, where a perfectly inelastic collision occurs, how does the final velocity relate to the initial velocity?
What is The final velocity is lower.
A heavy, solid disk and a hollow hoop of identical mass M and identical outer radius R are placed at the top of an incline and released from rest. They roll down without slipping. Why does the solid disk reach the bottom of the ramp first?
What is the solid disk has a smaller moment of inertia, meaning less torque is required to give it angular acceleration, leaving more energy available for forward linear velocity.
If the force is linearly increasing at a rate of 2 N/s, what is the impulse from 0 seconds to 2 seconds?
What is 4 N-s