What is the velocity of a bird that flies at 20m/s and then encounters a 5m/s headwind?

Speed of the bird that can fly in the air is given as

now if bird will encounter headwind from its opposite direction

now here we can say that due to headwind net velocity of the bird will decrease because here headwind will blow in opposite direction

so here as per vector addition of two velocity we can say that net velocity of the bird is given as

so here net velocity of the bird will be 15 m/s

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

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.