Bulbs c and b would still be screwed in if they were in to begin with and bulbs A, D, and E. would be unscrewed
I believe it would be 70%
You don't have to set it up. It's already set up. You only have to identify the correct set-up from the four choices.
The correct one is 'B', and it's a formula that you really should memorize.
You'll be using it in any science class that you take.
Weight of an object = (the object's mass) x (the local acceleration of gravity) .
W = m x g
The object's mass never changes. But its weight does, whenever
it goes to places where the acceleration of gravity is different.
That's why the same astronaut has different weights on Earth
and on the moon.
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Also, by the way, that bit about the "pendulum bob" in this question
may be there mainly to distract and confuse you. Everything I said
up there above the line is true for ANY object ... a pendulum bob,
a gold fish, a newborn baby, a turtle, a tree, a school-bus, a rock,
a house, a jug of milk, a book, a computer, a burrito, a puppy,
a snowball, an airplane, a cigar, or anything else.
Weight anyplace = (mass) x (gravity in that place)
Answer:
Unbalanced force -
Explanation:
Unbalanced force is expected to cause a body to accelerate.
Answer:
a) 0.303 s b) 6.77 m/s c) - 2.97 m/s d) 7.39 m/s
Explanation:
horizontal distance travel = 2.050 m, vertical distance travel = 0.45 m
Using equation of linear motion
Sy = Uy t + 1/2 gt² Uy is the inital vertical component of the velocity, t is the time taken for the vertical motion in seconds, and S is the vertical distance traveled, taken downward vertical motion as negative
-0.45 = 0 - 0.5 × 9.81×t²
0.45 / (0.5 × 9.81) = t²
t = √0.0917 = 0.303 s
b) horizontal distance traveled = horizontal velocity (Ux) × t
Ux = horizontal distance traveled / t = 2.050 / 0.303 = 6.77 m/s
c) Velocity in the vertical direction can be calculated using
Vy = Uy - gt where g is negative since initial U is zero
Vy = - 9.81 × 0.303 = - 2.97 m/s
d) the magnitude of the velocity = resultant of the the two velocity
using Pythagoras theorem
the magnitude of the velocity = √ ( 6.77² + 2.97²) = 7.39 m/s
at angle = tan^-1 ( 2.97 / 6.77) = 23.69⁰