An elastic loaded balloon launcher fires balloons at an angle of [38.0o above horizontal] from the surface of the ground. if the initial velocity is 25.0 m/s, find how far away the balloons are from the launcher when they hit the level ground again. 9)a movie stunt driver on a motorcycle speeds horizontally off a 50.0 m high cliff. how fast must the motorcycle leave the cliff-top if it's to land on the level ground below at a distance of 90.0 m from the base of the cliff?

#1

a balloon is launched at an angle 38 degree from the horizontal with speed 25 m/s

now the two component of the velocity of balloon is given as

Now the time of flight of the motion of balloon is given as

now the horizontal distance traveled by the balloon in the given time is

so the balloon will land at a distance of 62 m

#9

Motor cycle moves off horizontally with speed "v"

now the height of the cliff is given as

now time taken by the motor cycle to reach the bottom

now we know that in the given time motorcycle will cover horizontal distance 90 m

so we can say

so motorcycle will move off with speed 28.2 m/s

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.