A Car Is Moving at a Constant Velocity When It

question 42

Multiple Choice

A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?

• A)29.2 km/h
• B)44.8 km/h
• C)97.2 km/h
• D)105 km/h
• E)144 km/h

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Definitions:

α,β-unsaturated Aldehyde

An organic compound with a double bond between the alpha and beta carbon atoms and a carbonyl group at the alpha position.

β-diketone

A class of organic compounds containing two keto groups (C=O) attached to adjacent carbon atoms.

β-ketoester

A compound containing a keto group (=O) and an ester group (-COOR) separated by a carbon; it's a versatile intermediate in organic synthesis.

Conjugated Alkyne

A hydrocarbon compound that contains a conjugated system of alternating double and triple bonds within its carbon chain.