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Perry
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(mentor note) post moved here from non-homework thread hence no template.
A truck is traveling at a v=180 km/h speed on a straight road. At some point, the driver sees a police car and hits the brakes. If his average deceleration is a=-4m/s^2, how long will it take for its speed to go down to 80 km/h?
So, i converted the units to m/s and used the equation u=v-at to find the time, but the result was wrong. What am i missing?
A truck is traveling at a v=180 km/h speed on a straight road. At some point, the driver sees a police car and hits the brakes. If his average deceleration is a=-4m/s^2, how long will it take for its speed to go down to 80 km/h?
So, i converted the units to m/s and used the equation u=v-at to find the time, but the result was wrong. What am i missing?
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