Basics
What is velocity equaled to ?
distance / time
When the index card is quickly pulled away from the glass in a horizontal direction, the disk falls straight down into the glass. This action is a result of the disk’s
inertia
Which is a scalar quantity?
speed
What is the Units of Work?
Joules
Metal sphere A has a charge of -2 units and an identical metal sphere, B, has a charge of -4 units. If the spheres are brought into contact with each other and then separated, the charge on sphere B will be
-3 units
What is the smallest prefix (pico) value?
10-12
The weight of a typical high school physics student is closest to
600N
A 1,200-kilogram car traveling at 10 meters per second hits a tree and is brought to rest in 0.10 second. What is the magnitude of the average force acting on the car to bring it to rest?
1.2 × 105 N
What is the difference between KE and PE?
Kinetic Energy(KE) - the energy an object possess due to its motion.
Potential Energy(PE)- the ability of a body to do work because of it's position relative to other bodies.
What is the magnitude of the charge, in coulombs, of a lithium nucleus containing three protons and four neutrons?
4.8 x 10-19
How many sig figs are in: 3800 N
2
The diagram below shows a horizontal 12-newton force being applied to two blocks, A and B, initially at rest on a horizontal, frictionless surface. Block A has a mass of 1 kilogram and block B has a mass of 2 kilograms.The magnitude of the acceleration of block B is
4.0 m/s2
A 70-kilogram hockey player skating east on an ice rink is hit by a 0.1-kilogram hockey puck moving toward the west. The puck exerts a 50-newton force toward the west on the player. Determine the magnitude of the force that the player exerts on the puck during this collision.
50N
A boat weighing 900 newtons requires a horizontal force of 600 newtons to move it across the water at 15 meters per second. The boat’s engine must provide energy at the rate of
9.0 x 103 W
A positively charged particle about to enter the electric field between two oppositely charged parallel plates. The electric field will deflect the particle
to the bottom
What is an indirect/inverse Linear Relationship ?
"proportional" relationship variables increase / decrease at the same rate.
A high school physics student is sitting in a seat reading this question. The magnitude of the force with which the seat is pushing up on the student to support him is closest to
600 N
An 8.00-kilogram ball is fired horizontally from a 1.00 × 103 -kilogram cannon initially at rest. After having been fired, the momentum of the ball is 2.40 × 103 kilogram∙meters per second east. Calculate the magnitude of the cannon’s velocity after the ball is fired.
-2.4 m/s
A constant force is used to keep a block sliding at constant velocity along a rough horizontal track. As the block slides, there could be an increase in its
Internal energy only
Two oppositely charged parallel metal plates, 1.00 centimeter apart, exert a force with a magnitude of 3.60 × 10-15 newton on an electron placed between the plates. Calculate the magnitude of the electric field strength between the plates.
2.25 x 104 N/C
What does vector and scalar quantities measure?
Scalar: MAGNITUDE ONLY
Vector: BOTH MAGNITUDE AND DIRECTION
A student is standing in an elevator that is accelerating downward. The force that the student exerts on the floor of the elevator must be
less than the weight of the student when at rest
An 8.0-kilogram cart moving to the right at 4.0 meters per second about to make a head-on collision with a 4.0-kilogram cart moving to the left at 6.0 meters per second.After the collision, the 4.0-kilogram cart moves to the right at 3.0 meters per second. What is the velocity of the 8.0-kilogram cart after the collision?
.50 m/s left
A 50-kilogram child running at 6 meters per second jumps onto a stationary 10-kilogram sled. The sled is on a level frictionless surface. Calculate the speed of the sled with the child after she jumps onto the sled.
5 m/s
The centers of two small charged particles are separated by a distance of 1.2 × 10-4 meter. The charges on the particles are +8.0 × 10-19 coulomb and +4.8 × 10-19 coulomb, respectively.Calculate the magnitude of the electrostatic force between these two particles.
2.4 x 10 -19 N