Speed = distance/time km/s
Formula for Speed
Average speed = total distance covered/time interval (320 km/4h = 80 km)
Formula for Average speed
20 km/h = 6 m/s
12 mi/h = ? km/h =? m/s
The speed of an object and the specification of its direction.
Velocity is also considered a
Constant speed with constant direction is called
How quickly velocity changes is called
Acceleration = change in velocity/time interval
Formula for acceleration
Velocity acquired = acceleration x time
Formula for velocity acquired
motion under the influence of gravity alone
10 m/s squared
v = g x t (g = 10)
formula for velocity of a falling object is
d = 1/2 gt^2
formula for distance of falling objects is
d = (Vi + Vf/2) x t
if object is thrown, formula for distance is
t = (square root of 2d/a) a=g=10m/s^2
Formula for for hang time
Quantity in physics that has both magnitude and direction
The horses speed is 30 km/h (formula is d = 15 speed/time (0.5)
What is the average speed in kilometers per hour for a horse that gallops a distance of 15 km in a time of 30 min?
Yes the car moves at a constant speed.
If a car moves at constant velocity, does it also move at a constant speed?
Yes it maintains constant speed, but no it does not maintain a constant velocity because a constant velocity is both constant speed and constant direction.
If a car is moving at 90 km/h and it rounds a corner, also at 90 km/h, does it maintain a constant speed? A constant velocity? Defend your answer?
What is the acceleration of a car that increases its velocity from 0 to 100 km/h in 10 s?
The acceleration is 0 because the car maintains constant velocity.
What is the acceleration of a car that maintains a constant velocity of 100 km/h for 10 s?
the gain is g which is 10m/s^2
What is the gain in speed per second for a freely falling object?
v = gt velocity is 50m/s, 60 m/s
What is the velocity acquired by a freely falling object 5s after it is dropped from a rest position? What is it 6 s after?
the object loses g, 10m/s
When an object is thrown upward, how much speed does it lose each seconf?
d = 1/2gt^2, After 1 second 5m, after 4 s 80m
What is the distance fallen for a freely falling object 1 s after being dropped from a rest position? What is it 4 s after?
An example is a car slowing down.
Can you cite an example in which the acceleration of a body is opposite in direction to its velocity? if so, what is your example?