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Kinematics
Kinematics is the study of how a body moves. This includes linear motion, angular motion, and rotational motion.
3,459 Questions
If some thing is going 5 miles per hour how many feet per second is that?
5 mph is 7.3 feet per second.
If you're trying to determine the speed of your car by looking at the RPM, you can't do that without knowing the gear ratio that exists between the engine and the wheels. What you can do is to drive in different gears and see what the speed is for various engine RPMs.
Examples of constant speed but changing acceleration?
A body moving with constant speed in a circular path has acceleration changing at every point.
What does the expression 80 km per hour mean?
80 kilometers per hour, which equates to 49.71 miles per hour.
If you mean 253 km/h, then:
1mi = 1.61km
253km/h x 1mi/1.61km = 157mi/h
The Condition of Equilibrium, Force equal zero, is the condition of an object at rest or moving at constant velocity.
Non-Equilibrium Condition, Force is not zero, is the condition for an object to move with increasing velocity.
How would the potential energy of an object be different on the moon?
The gravitational potential energy would be less for the same height above the surface. This is because the gravitational constant on the moon is less than that of the Earth. Potential energy is defined as mgh, where m is the mass, g is the gravitational constant, and h is the height.
Mach 24 is roughly equal 18,264 miles per hour.
Mach is a term used to describe the ration of the speed of an object to the speed of sound. The speed of sound, at sea level, is roughly 761 mph. Mach 24 means that the ration of the speed of an object to the speed of sound is 24, meaning 24 times the speed of sound. Thus, at sea level, an object travelling at mach 24 is travelling at 24 times 761mph, which is 18,264 miles per hour.
Projectiles are basically just objects that move through air along a trajectory without a propulsion system.
A simpler definition is that projectiles are things that move through air along a curved path without anything to push it forward, like a motor. Examples would be like an eraser that you throw at someone.
How many feet would you travel in 3 seconds if you were going 75 mph?
330 feet
Given:
Time = 3 seconds
Rate:
= 75 mph
= 75miles/hour * 1hour/3600seconds * 5280feet/1mile
= 110 feet/seconds
Formula:
Distance = Rate * Time
Distance:
= 110 feet/seconds * 3 seconds
= 330 feet
How do you convert 1500 ft per minute to miles per hour?
1mi = 5280ft
1h = 60min
1500ft/min x 1mi/5280ft x 60min/h = 17.05mi/h (rounded)
KE = 1/2 mass *velocity squared
A direct relationship. More mass, and a truck has more mass, and the more kinetic energy if velocities are held equal.
How will the mass of a 70 kg man change if he is standing on Jupiter?
Mass doesn't change no matter what planet you go to. Weight is what changes since the acceleration due to gravity of different planets are different.
