A pile driver falls freely from a height of 4.50 m above a pile. What is its velocity as it hits the pile? Remember to include your data, equation, and work when solving this problem.

9.4 m/s

Step-by-step explanation:

We are given that

Height of pile driver above a pile =h=4.5 m

Acceleration due to gravity=

According to law of conservation of energy

K.E=Potential energy

Substitute the values

m/s

Hence, the velocity of pile driver as it hits the pile=9.4 m/s

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.

well your weight will go up if you are not going to burn the calories/ carbs

step-by-step explanation: