Physics  Kinematics
posted by Iman .
Need some help with my homework!
Question 7
a) Acceleration is the rate of change of velocity
Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration and the time interval respectively.
State the conditions that must be satisfied for the equation to be valid.
Question 11
An aircraft has a landing velocity of 50m/s and decelerates uniformly at 10m/s^2 until its velocity is reduced to 10m/s. Calculate
a) The time taken to slow down to this velocity, (answer is 4s but how do I get it?)
b) The distance covered during the deceleration. (answer is 120m but how do I get it?)
Thanks guys! :D
Respond to this Question
Similar Questions

Math Vocabulary
What does distance/ time/ rate of speed mean? 
active physics
from the question we just did, how much force is neede to stop in 20 seconds! OK. think it through. If it's going at 10 m/s, and then it stops, what is it's change in velocity? 
Physics
1.(a)When a record player is stopped, the turnabble initially rotating at 33.3rpm,slows down and stops 60s.Calculate the angular acceleration of the turnable.(b)a grinding wheel when turned on,accelerates with an agnular acceleration … 
Physics
Could you please check my answers and help me out with the last two? 
Physics
A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s. What is its acceleration? 
AP Physics
I'm trying to derive the formula v^2 = v0^2 + 2a(xx0) were zeros are subscripts my book tells me to derive it this way use the definition of average velocity to derive a formula for x use the formula for average velocity when constant … 
Physics PLEASE
I'm trying to derive the formula v^2 = v0^2 + 2a(xx0) were zeros are subscripts my book tells me to derive it this way use the definition of average velocity to derive a formula for x use the formula for average velocity when constant … 
Physics Changing Acceleration
Derive position, velocity, and acceleration kinematics equations for an object undergoing a changing acceleration? 
Physics
Automotive engineers refer to the time rate of change of acceleration as the "jerk." Assume an object moves in one dimension such that its jerk J is constant. (a) Determine expressions for its acceleration ax(t), velocity vx(t), and … 
11 Grade MathBased Physics
Could someone check these practice test questions over for me?