Physics of Motion
The unit that is used to measure Force.
What is a Newton (N)
What is Newton's first name?
Isaac
What is Newton's Third Law?
Forces occur in pairs - equal magnitudes and opposite directions.
How do you calculate an object's average speed?
Distance divided by time.
What number do we use for gravitational acceleration, represented by "g"?
What is 9.82 m/s2
The energy present in all MOVING objects.
What is Kinetic energy
Which Newton's Law States: "An object subject to no resultant force will move along a straight line"?
What is Newton's First Law?
Name Three forces acting on a ball that has been thrown in the air.
What is Air Resistance and Gravity.
What throw angle maximizes the distance of a throw if air resistance is neglected?
45 degrees
A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. What is the magnitude of the force that the object exerts on the child?
100N
What is the potentiel energy near the surface of the earth.
m*g*h
What "attractive" force acts between any two objects?
What is gravity.
The difference between weight and mass
Weight is the gravitational acceleration times the mass.
What is the difference between speed and velocity?
Speed only shows how fast an object is going, velocity describes the speed and direction.
The speed of a car is increased uniformly from 11 meters per second to 19 meters per second. What is the average speed of the car during this interval?
15 m/s
What unit is used to measure Pressure?
Pascal
What equation for Force is described by Newton's Second Law?
What is F = M x A
I drop a 5 oz baseball and a 10 lb rock from the same height, which hits the ground first?
they hit at the same time
What is the force that opposes gravity that acts on an object sitting on a counter (what force is pushing back up)?
What is normal force?
On the surface of planet X, a body with a mass of 10. kilograms weighs 40. newtons. What is the magnitude of the acceleration due to gravity on the surface of planet X?
4 m/s2
If a Car is traveling at 40 m/s for 10 s what is the distance it will travel?
D= S x T
D= 40 x 10
D= 400m
What is the mass of an object that is accelerating at 20m/s2 with a force of 10,000N?
M = F/A
M= 10,000 / 20
M= 500kg
You are standing on a scale in an elevator near the surface of the earth accelerating by 20 m/s^2. How many percent of your body weight does the scale approximately show?
Three times.
A sailboat on a lake sails 40. meters north and then sails 40. meters due east. What is the new position of the sailboat?
57 m northeast
A baseball bat exerts a force of magnitude F on a ball. If the mass of the bat is three times the mass of the ball, the magnitude of the force of the ball on the bat is
(1) F (3) 3F
(2) 2F (4) F/3
(1) F