Kinematics
The acceleration of a car going from 0 to 60 m/s in 4 seconds.
What is 15 m/s2
Newton's second law
What is F = ma
The force being exerted if you do 30 J of work to move a cart 6 m.
What is 5 N
This is always conserved in collisions.
What is momentum?
Unit for angular momentum
What is kg⋅m²/s
The amount of time a car requires to slow to rest when decelerating at 3 m/s and having a starting speed of 60 m/s.
What is 20 seconds
The coefficient of friction that is greater than the other
What is static friction?
The height of a building where a ball is dropped from and hits the ground at 20 m/s.
What is 20 m
The center of mass of a 35 kg ball and 55 kg ball 4.5 m apart.
What is 2.75 m from the 35 kg ball.
A carousel rotates at a steady rate, completing one full revolution every 30 seconds. Two riders sit at different distances from the center—one is 2 meters away, and the other is 5 meters away. The tangential velocities of each person is...
What is 0.419 m/s and 1.047 m/s.
How far from the base of the table a toy car lands if rolls off a 1.25 m high table with a horizontal speed of 2.0 m/s.
What is 1.0 m
You are all collectively pushing Vince with a force of 620 N and he is 55 kg, and the coefficient of kinetic friction is 0.4. Vince's acceleration is...
What is 80/11 or 7.27 m/s
A 3 kg ball is lying on the ground. The final speed of the ball when you do 60 J of work.
What is 2sqrt10 or 6.32 m/s
The change in momentum when 4 kg ball hits a stationary wall with a speed of 5 m/s and bounces back with the same speed.
What is 40 kg m/s
The centripetal acceleration of a rotating platform spins at 10 RPM (revolutions per minute), and a 4 kg object is placed 2.5 meters from the center.
What is 3 m/s^2
The horizontal displacement of a soccer ball kicked at 20 m/s at an angle of 30° above the horizontal.
What is 34.64 m
You pull a 20 kg crate across a horizontal floor by applying a force of 100 N at a 30° angle above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. The acceleration of the crate is...
What is 2.51 m/s^2
You are sledding down a 10 m hill, and then slide up a 8 m hill with no friction. Find the speed at the bottom of the hill and top of the 8 m hill.
What is 10sqrt2 or 14.14 m/s at the bottom of the hill and 2sqrt10 or 6.32 m/s at the top of the 8 m hill.
The final speed and amount of KE lost of a perfectly inelastic collision between a 2 kg car going at 4 m/s and a 5 kg car going at 1 m/s.
What is 13/7 or 1.86 m/s, and 6.43 J lost.
The rotational kinetic energy and momentum of a solid disk of mass 2.0 kg and radius 0.5 m is spinning about its center at an angular speed of 6.0 rad/s.
What is 1.5 kg m/s and 4.5 J
Car A is traveling at 20 m/s and is 50 meters behind Car B, which is traveling at 15 m/s, both moving in the same direction toward a red traffic light. As soon as the light turns green, Car A begins to accelerate at 2 m/s², while Car B continues at constant speed.
Time it will take Car A to catch up to Car B
Distance from Car A's starting point that will happen
What is 5 seconds
What is 125 meters
A 2 kg mass is hanging from the ceiling of an elevator by a rope. The elevator is accelerating downward at 3 m/s^2. The tension in the rope is...
What is 14 N
A 5 kg block is pulled along a horizontal surface by a rope with tension T = 50 N, which makes a 60° angle above the horizontal. The net work done when it moves 8 meters across a surface with μₖ = 0.2.
What is 189.3 J
This happens when a 2 kg cart moving at 5 m/s collides head-on with a 1 kg cart moving at –3 m/s, and both carts bounce off each other perfectly elastically. What are their final velocities?
What is -1/3 m/s and 23/3 m/s
A 2-meter long seesaw is pivoted at its center. A 30 kg child sits at one end. Where a 40 kg child sit on the opposite side to balance it.
What is 0.75 m from the pivot