Answer:
E. downward and constant
Explanation:
Freefall is a special case of motion with constant acceleration because the acceleration due to gravity is always constant and downward. This is true even when an object is thrown upward or has zero velocity.
For example, when a ball is thrown up in the air, the ball's velocity is initially upward. Since gravity pulls the object toward the earth with a constant acceleration ggg, the magnitude of velocity decreases as the ball approaches maximum height. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth.
The answer is Prove a hypothesis
Answer:
Explanation:
The equation for centripetal force is
. We have all the values we need except for the radius. We have the circumference of the circle, though, so we will solve for the radius using that and the fact that C = 2πr:
3.04 = 2(3.1415)r and
r = .484 m, to the correct number of sig fig's.
Now that we have everything we need and isolating the v NOT squared:
and filling in:
. This answer will need 2 sig fig's since 2100 has 2 sig fig's in it. That means that the velocity of the test car is
1.1 m/sec
Answer:
Explanation:
Let the magnetic field be
B = 
For magnetic force , the expression is
F = L ( I x B )
= 1.5 ( 24i x )
F = 36 B_y k - 36 B_z j
Given
F = 3 j + 2 k
Equating equal terms
we have
B_y = 2 / 36 , B_z = - 3 / 36
Now the direction of current is changed to y direction
so F = ![1.5[ 24j \times ( B_xi +B_yj +B_z k )]](https://tex.z-dn.net/?f=1.5%5B%2024j%20%5Ctimes%20%28%20B_xi%20%2BB_yj%20%2BB_z%20k%20%29%5D)
Given
F = - 3 i - 2 k
Equating equal terms
we have
B_x = 2 / 36 , B_z = - 3 / 36
So B = 2/36 i + 2/36 j - 3/ 36 k
Magnitude of B
= 4.1 / 36 T
Answer:
The Y-axis in a Velocity/Time graph is the Velocity.
Explanation:
The speed is the velocity. Like in math, speed(velocity)=distance over time. Where time is the X-axis.
