Kinematics
The slope of a line on a position vs time graph
What is velocity
The only force acting on a projectile
What is gravity
Find the acceleration of 3 kg object with an net force of -999N
-333 m/s^2
The formula for momentum
Energy of motion
What is kinetic energy
The slope of a line on a velocity vs time graph
What is acceleration
The formula for time to fall to Earth when given height
t = sqrt(2h/g)
What is the acceleration due to gravity on a planet 3 times larger than Earth?
29.4 m/s^2
Which has more momentum, a 3000kg truck moving 3 m/s or a 1000kg car moving 10 m/s?
The car
Energy stored in chemical bonds
What is chemical potential energy
A curved line on a position vs time graph represents...
What is acceleration
If there is a constant velocity, there is also a constant _
displacement
What is the mass of a truck that has a momentum of 540000 kg·m/s that is traveling at 32 m/s to the south? use sig figs
1700 kg
In terms of momentum, why is a drinking glass less likely to break if it falls on a carpet floor than falling on a hard concrete floor?
The carpet floor has more "give," which means it takes more time for the momentum of the falling glass to reduce to zero as it hits the surface. More time means less force, which means less chance of breaking upon contact.
Energy cannot be created or destroyed
What is the law of conservation of energy?
A hippo walks from +2.0 to -1.5 to +4.0 to -3.5 on the number line in 6 seconds. What is the hippo's velocity?
0.917 m/s
What happens to an object in motion with no gravity?
Continues in motion with the same speed in the same direction
A golf ball is hit with a 45 degree angle and it's initial velocity is 10 m/s. What are vx and vy?
vx = vy = 7m/s
A 1000-kg car moving at 10 m/s that brakes to a stop in 5 s has an average braking force of
2000N
A 5.0kg object falls from a height of 5.0m. What is it's final velocity before hitting the ground? Use sig figs
63 m/s
The rate at which an object's velocity changes is the definition for _____.
acceleration
Will gravity affect the cannonball's horizontal motion?
No
A skateboarder with a mass of 75.0 kg at the top of a 4.50 m ramp will have how much kinetic energy at the moment before they reach the bottom of the ramp? (g=9.81m/s2)
3.31 kJ
When a cannon fires a cannonball at a given speed, the smaller recoil speed of the cannon vs the ball is due its different
mass
The amount of energy in 1 kg of matter
9 x 10^16 J