Uniform Aceleration: Speed of Car at End of Braking Period
Not what you're looking for? Search our solutions OR ask your own Custom question.
"A car accelerates from rest and travels for 4.98 s with a uniform acceleration of +1.50 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s^2. If the brakes are applied for 3.06s, how fast is the car going at the end of the braking period? And how far has the car gone?"
© BrainMass Inc. brainmass.com March 6, 2023, 1:13 pm ad1c9bdddfhttps://brainmass.com/physics/acceleration/uniform-aceleration-speed-car-end-braking-period-8755
Solution Preview
Solution. By the hypothesis, the initial speed of the car is v0=0, and the uniform acceleration a1=1.5m/s^2. So, after t1=4.98s, the speed of the car V is
V=a1*t1=4.98*1.5=7.47 (m/s).
The direction of V is the same as the acceleration, say "right".
Then, the driver applies the brakes, causing a uniform acceleration of a2=-1.99m/s^. The "-" means decreasing ...
Solution Summary
Excellent solution complete with formulas, workings and answers.
$2.49