Answer:
Thus the distance traveled horizontally is 116.28 m
Solution:
As per the question:
Distance covered in 26 steps = 20 m
Thus
Distance covered in one step, step size =
Total steps taken = 152
Now, the distance covered in 152 steps =
The distance covered in 152 steps, D =
The above distances are on a slope of above horizontal.
Thus the horizontal component of this distance is given by:
where
= horizontal component of distance, D
Answer:
Time taken,
Explanation:
Given that,
Initial speed of the electron,
Acceleration of the electron,
Final speed of the electron,
We need to find the time taken by the electron to reach its final speed. It can be calculated using first equation of motion as :
So, the time to reach its final speed is . Hence, this is the required solution.
Answer:
A. The force between the wires Is attractive, this is because there are two wires of equal current flowing in the same direction thus using the right hand rule the force vectors of the two wires point to each other.
B: see attached file for explanation
Explanation:
Answer:
C. The wheel with spokes has about twice the KE.
Explanation:
Given that
Mass , radius and the angular speed for both the wheels are same.
radius = r
Mass = m
Angular speed = ω
The angular kinetic energy KE given as
I=Moment of inertia for wheels
Wheel made of spokes
I₁ = m r²
Wheel like a disk
I₂ = 0.5 m r²
Now by comparing kinetic energy
KE₁= 2 KE₂
Therefore answer is C.
Answer:
5.72 seconds
848.27 m/s
97.94 m
Explanation:
t = Time taken
u = Initial velocity = 15 m/s
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²
Time taken to reach maximum height is 0.97 seconds
So, the stone would travel 11.47 m up
So, total height stone would fall is 75+11.47 = 86.47 m
Total distance travelled by the stone would be 75+11.47+11.47 = 97.94 m
Time taken by the stone to travel 86.47 m to the water is is 4.2 seconds
The stone reaches the water after 4.2+1.52 = 5.72 seconds after throwing the stone
Speed just before hitting the water is 848.27 m/s