A 20 kg body is moving through space (ignore gravity) in the positive direction of an x axis with a speed vi when, due to an internal explosion, it breaks into two pieces. Piece A has a mass of 8 kg moves away from the point of explosion with a speed vA in a direction 30° measured counterclockwise from the +x direction. Piece B with a mass of 12 kg moves along the y axis with a speed of 400 m/s. Goal: Determine the speeds vA and vi..

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

more than, less

less than, more