Whilst you could in principle use those equations, this question is best solved using kinematics equations (of uniform acceleration).swede5670 said:Homework Statement
Flash Maddie is running at a whopping velocity of 30 mph. She then sees Mr. T driving down the road straight towards her so she accellerates -5 mph/s for 10 seconds. what Is Maddie's velocity now. (In mph)
Homework Equations
V = Change in distance / change in time
a = change in velocity / change in time
The Attempt at a Solution
I'm just not sure how to approach the problem in general and I'm not sure how to approach the negative acceleration.
a = change in velocity / change in time
Yes, that's correct (with one minor correction, you should add the -50 to 30). In actual fact, both methods are identical:swede5670 said:Hootenanny: What are these equations and how would I use them?
Red Belly: Should I multiply -5 MPH/s by 10 and then subtract it from 30 mph?
Velocity is a measurement of an object's speed and direction of motion. It is a vector quantity, meaning it has both magnitude (speed) and direction.
Acceleration is the rate of change of an object's velocity. It is also a vector quantity, meaning it has both magnitude (how much the velocity changes) and direction.
Velocity and speed are often used interchangeably, but they have different meanings. While speed is a scalar quantity that only measures the magnitude of an object's motion, velocity is a vector quantity that also takes into account the direction of the object's motion.
Velocity is calculated by dividing the displacement (change in position) of an object by the time taken for that displacement. The formula for velocity is v = Δx/Δt, where v represents velocity, Δx represents displacement, and Δt represents time.
Acceleration is caused by a change in an object's velocity. This can occur due to a change in speed, direction, or both. It can also be caused by external forces acting on the object, such as gravity or friction.