A car traveling with an initial velocity of -25 m/s changes velocity to -35 m/s in a time of 10.3s. Is the constant acceleration of the car positive or negative in this problem? Explain why.
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intial velocity=-25m/s final velocity=-35m/s
acceletion=(final velocity-initial velocity)/time
the acceration is negative because the vehicle is decelarating
how do we know that the car is deaccelerating if our accretion number that you got is positive?
the number i got acceration is negative -0.9709
this negative sign means it is decerating when giving answers in decerating you do not include negative sign
Oh i apologize i didn't see the negative sign. Thank you so much for the help.
Can you help me with a different question?
A car traveling with an initial velocity of -25 m/s comes to a stop in a time of 6.3s. Is the constant acceleration of the car positive or negative in this problem? Explain why.
when the car comes to rest its final velocity will be zero
acceleration=change in velocity/time
the acceleration is by positive because negative multiply negative is a positive
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