Answer:
a) Ws = 2.548 J
b) Wf = 1.153 J
c) v = 1.923 m / s
Explanation:
a) The work done by the spring force
Ws = ½ * k * x²
Ws = ½ * 260 N/m *0.14² m
Ws = 2.548J
b) The increase in thermal energy can by find using
Et = Wf
Wf = µ * m *g * x
Wf = 0.42 * 2.0 kg *9.8 m/s² * 0.14m
Wf = 1.153 J
c) The speed just as the block reaches can by fin using
EK = Ws + Et
Ek = ( 2.548 + 1.153 ) J = 3.7 J
Ek = ½ * m * v²
v² = 2* Ek / m
v = √[2 * 3.7 J / 2.0 kg]
v = 1.923 m / s
Using Newton's Second Law, F = ma, where F is the net force
So the net force is:
F = (6kg)(4m/s^2) = 24N
Since you are applying a horizontal force of 30N, we can find the force of friction by the difference of the net force and the applied force.
30N-24N = 6N
Answer:
23 m
Explanation:
If acceleration is uniform then
distance = ( average velocity ) × time
= ( (initial velocity +final velocity )/2 ) × time
= (( 1.5 + 1.0) /2 ) × 18.4
= ( 2.5/2 ) × 18.4
= 1.25× 18.4
= 23 m
Hey there! :D
Plug in what you know.
F=ma
F= force m= mass a= acceleration
200 N= m*8 ms
Divide both sides by 8.
m= 25
The mass is 25.
I hope this helps!
~kaikers
Answer:
Are very small.
Explanation:
Scientists use models to study atoms because atoms are extremely small and can't even be seen.
