Im positive that the answer is b
The rotational kinematics allows finding that the response for the time to reach the washing speed is
t = 4.26 s
Kinematics studies the motion of bodies, in the special case that the motion is circular is called rotational kinematics.
θ = w₀ t + ½ α t²
Where θ is the angle, w₀ are the initial angular velocity, α is the angular acceleration and t is the time
Rotational kinematics is written in units of radians, therefore all magnitudes must be reduced,
θ = 6 rev ( ) = 12π rad
In this case the washing machine starts from rest, therefore the initial rotational velocity is zero
θ = ½ α t²
t =
t =
t = 4.26 s
In conclusion using rotational kinematics we can find that the answer for the time to reach the washing speed is
t = 4.26 s
Learn more about rotational kinematics here:
brainly.com/question/20338754
Answer:
Man will not slide down
Explanation:
Given:
Coefficient of static friction = 0.25
Angle = 13°
Computation:
Man will slide down if
tan13° > Coefficient of static friction
Tan 13 = 0.23
So,
0.23 < 0.25
So,
Man will not slide down
Answer:
192851877 s or 6.1 years
Explanation:
1.8 km = 1800 m
2.93 kW = 2930 W
First we calculate the potential energy needed to pump of water to 1800 m high. Suppose g = 9.81 m/s2:
Then we can calculate the time it takes for a pump with power of 2930 W to perform that amount of energy