A model rocket is launched at an angle of 70° above the x axis, with an initial velocity of 40 m/s. How long will the rocket be
1 answer:
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Answer:
smaller acceleration, so lower change in velocity
Explanation:
To answer this question we examine the equation that relates mass with force and with acceleration: .
Since we want to know what happens to the acceleration, we solve for it in the equation:
Notice that we are asked what happens when the force applied is the same, but now it is applied in an object with more mass (M).
We therefore would have to compare our initial form:
with the new one:
wher the denominator is a larger quantity, therefore making our division/quotient smaller. Then, we conclude that the acceleration will be smaller, and therefore the change in velocity of the object will be lower.
Given parameters:
Acceleration of the car = 1.6m/s
Initial speed = 80km/hr
Final speed = 110km/hr
Solution:
Time taken to achieve this speed = ?
Solution:
Acceleration is the rate of change of velocity with the time taken.
Mathematically;
a =
where a is the acceleration
V is the final velocity
U is the initial velocity
T is the time taken
Now make the unknown time the subject of the expression;
aT = V - U
T =
Convert the given acceleration to km/hr;
1.6m/s = 1.6 x x
x
= 5.76km/hr
Input the parameters and solve;
T = = 5.2hrs
The time taken is 5.2hrs