- #1

bjudia

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**1. A 750-kg automobile is moving at 20.0 m/s at a height**

of 5.0 m above the bottom of a hill when it runs out of

gasoline. The car coasts down the hill and then continues

coasting up the other side until it comes to rest.

Ignoring frictional forces and air resistance, what is the

value of h, the highest position the car reaches above

the bottom of the hill?a

of 5.0 m above the bottom of a hill when it runs out of

gasoline. The car coasts down the hill and then continues

coasting up the other side until it comes to rest.

Ignoring frictional forces and air resistance, what is the

value of h, the highest position the car reaches above

the bottom of the hill?a

**2. E**

_{1}=E_{2}or K_{1}+ U_{1}= K_{2}+ U_{2}**3. 1/2mv**

^{2}+mgy=1/2mv^{2}+mgy1/2(750kg)(20m/s)

^{2}+(750kg)(9.8m/s

^{2})(5m)=1/2(750kg)(0m/s)

^{2}+(750kg)(9.8m/s

^{2})(Y)

I got y=25.41m or 25m with correct sig figs is that correct?