Posted by **asia** on Monday, January 11, 2010 at 9:43pm.

A 1100 kg car rolling on a horizontal surface has speed v = 70 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring?

- physics -
**drwls**, Monday, January 11, 2010 at 10:05pm
The car comes to rest (temporarily)at compression distance X, at which point the initial kiteci energy (1/2) M V^2 is converted to spring potential energt, (1/2)kX^2.

Therefore

kX^2 = mV^2

k = m (V/X)^2

Make sure you convert V to meters per second before using the formula. k will be in Newtons/meter

## Answer this Question

## Related Questions

- physics - A 1100-kg car moving on a horizontal surface has speed v = 60km/h when...
- physics - A 1350 kg car rolling on a horizontal surface has a speed of 40 km/hr ...
- Physics - A 1000 kg car rolling on a horizontal surface has speed v = 55 km/h ...
- physics - A 900 kg car rolling on a horizontal surface has speed v = 55 km/h ...
- physics - A 1300-kg car rolling on a horizontal surface has speed v = 65 km/h ...
- PHYSICS - A 950 kg car rolling on a horizontal surface has speed v = 50 km/h ...
- college physics - A 1300 kg car rolling on a horizontal surface has speed v = 65...
- physics - A 1200-kg car rolling on a horizontal surface has a speed v= 65km/h ...
- Physics - A 1650 kg car rolling on a horizontal surface has a speed of 20 km/hr ...
- physics - A 1370 kg car rolling on a horizontal surface has a speed of 20 km/hr ...

More Related Questions