1. a bowling ball with a mass of 2-kg sits on top of a building that is 40 meters tall.

solve for gpe

formula:

plug in numbers:

answer (with units)

2. a bowling ball with a mass of 2-kg rolls at a speed of 5 m/s on the roof of the building that is 40 tall.

solve for gpe and ke

gpe formula:
ke formula:

plug in numbers:
plug in numbers:

answer (with units)
answer (with units)

3. a 2-kg bowling ball rolls at a speed of 10 m/s on the ground.
solve for ke:

formula:

plug in numbers:

answer (with units)

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s.
solve for gpe and ke

gpe formula:
ke formula:

plug in numbers:
plug in numbers:

answer (with units)
answer (with units)

1. A 2-kg bowling ball sits on top of a building that is 40 meters tall. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has:

KE = 0 (because velocity is 0)

PE = mgh = 2kg*9.8m/s^2*40m= 784 joule

2. A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has:

Both

KE = [1/2]m*v^2 = [1/2](2kg)(5m/s)^2 =  25 joul

PE = mgh = 40 joule

3. A 2-kg bowling ball rolls at a speed of 10 m/s on the ground. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has:  

KE = [1/2]m(v^2) = [1/2]2kg*(10m/s)^2 = 100 joule

GPE = mgh = 0

1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

KE = [1/2]m(v^2) => v = √[2KE/m] = √[2*50,000joules/1000kg] = 10m/s

2. A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?  

GPE = mgh => h = GPE / (mg) = 39,200 joules / (200kg * 9.8m/s^2) = 20m

3. A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?

KE = [1/2]m(v^2) => v = √ [ 2KE/m] = √[2*12.5 j / 1kg] = 7.9 m/s

GPE = mgh => h = GPE/(mg) = 98/(1kg*9.8m/s^2) = 10 m

Step-by-step explanation:

bc someone else said it

false

step-by-step explanation:

rulers and compasses arent required in order to bisect an angle because when bisecting angles, you're making a "half circle" and considering in order to bisect an angle it wouldn't be straight, you wouldn't need either of the two

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.