Answer:
<h3>
The coefficient of kinetic friction between the puck and the ice is 0.12</h3>
Explanation:
Given :
Initial speed
Displacement m
From the kinematics equation,
Where final velocity, in our example it is zero (), acceleration.
From the formula of friction,
Minus sign represent friction is oppose the motion
Where ( normal reaction force )
( ∵ )
So coefficient of friction,
Therefore, the coefficient of kinetic friction between the puck and the ice is 0.12 .
Answer:
-13.09 N
Explanation:
Hello!
With Coulomb's law, the force of attraction between two charges can be calculated:
F=(K*q_1*q_2)/r^2
K=9*〖10〗^9 (N*m^2)/C^2
9,9 cm = 0,099 m
-2,3µC= -2,3*〖10〗^-6 C
6,2µC= 6,2*〖10〗^-6 C
By simplifying units the force remains in Newton.
Successes with your homework!
Answer:
Burning fossil fuels increases greenhouse gas emissions.
B. If all plants are watered at least once a day then they will all grow at least 1 cm a day.
All plants grow at different rates.
Hope this helps! XD
Answer:
The ball travels a distance of 20 m in the time interval of 4 s
Explanation:
Using s = ut + 1/2at² where s = distance travelled by the ball, u = initial velocity of ball = 0 m/s (since it starts from rest), a = acceleration of the ball = 2.50 m/s² and t = time = 4 s.
Substituting the variables into the equation, we have
s = ut + 1/2at²
s = 0 × 4 s + 1/2 × 2.50 m/s² × (4 s)²
s = 0 + 1/2 × 2.50 m/s² × 16 s²
s = 1/2 × 40 m
s = 20 m
So, the ball travels a distance of 20 m in the time interval of 4 s.