Answer:
2.6 m
Explanation:
The work done by the bird is given by
where
F is the force exerted
d is the distance covered
In this problem, we know:
is the work
is the force
Solving the equation for d, we find the distance covered by the bird:
The one with the greatest mass would, when everything else is equal. I'm having trouble making out your list of choices.
80 because if you add 50 +30 =80 so yea that why I pick 80
Answer:
D. 48.985 N
Explanation:
Newton's second law states that:
which means that the net force acting on an object is equal to the product between the object's mass and its acceleration.
The equation of the forces for the briefcase in the elevator therefore is given by:
where
N is the normal reaction exerted on the briefcase
(mg) is the weight of the briefcase, with
m = 4.5 kg being its mass
g = 9.8 m/s^2 is the acceleration of gravity
a = 1.10 m/s^2 is the acceleration
Here we chose upward as positive direction.
Solving for N, we find the normal force:
So the closest answer is
D. 48.985 N
Answer:
Explanation:
given,
mass of hoop = 2.75 Kg
horizontal speed = 4.5 m/s
angle with horizontal = 25°
m g l sin θ = m ( v² - u² )
g l sin θ = ( v² - u² )
9.8 x 3 x sin 25° = ( v² - 4.5² )
12.425 = v² - 20.25
v² = 32.675
v = 5.72 m/s
Rotational