# A car with a total mass of 1400kg (including occupants), traveling at 60kmh^-1 hits a large tree and stops in 0.08seconds. What is the magnitude of the deceleration of the 70kg driver of the car if he is wearing a properly fitted seat belt?

##### 1 Answer

May 6, 2017

#### Answer:

#### Explanation:

Using the kinematic equation

#v=u+at#

where symbols have their respective meanings. Inserting given values in SI units, and assuming that deceleration is constant, we have

This is deceleration of car, its occupants including driver.