Answer:
58.0 m/s
Explanation:
We can solve the problem by using the following SUVAT equation:
where
v is the final velocity of the roller coaster
u = 13 m/s is the initial velocity
a = 4.0 m/s^2 is the acceleration
s = 400 m is the displacement
Substituting and solving for v, we find
In a magnetic field, it would require the thing that passes through it to have all their electrons paired up for it to be unaffected or repulsed. And if there is an empty orbital or an unpaired electron, it’ll be attracted. Sunlight can’t have these properties, it has no charge or mass
Answer:
33.68 N
Explanation:
Data
W= 32J
d- 0.95m
F= ?
W=Fd
They are asking for the magnitude which is the force, so you need to solve for force.
F=W/d
= 32J/ 0.95m
= 33.68 N
Explanation:
a) The height of the ball h with respect to the reference line is
so its initial gravitational potential energy is
b) To find the speed of the ball at the reference point, let's use the conservation law of energy:
We know that the initial kinetic energy as well as its final gravitational potential energy are zero so we can write the conservation law as
Note that the mass gets cancelled out and then we solve for the velocity v as
Answer:
Option A, Robinson Crusoe's
Explanation:
A far sighted person uses eyeglasses with Convex lenses. These lenses are thick at the center and thin at the edges. A farsighted person is unable to focus on nearby objects because the eye ball of a farsighted person is smaller than the normal size due to which all the refracted rays could not meet at the retina.
A convex lenses focuses the light at one point, this property will help in focusing the sunlight at one point for starting fire.