Answer:
Tension in Cord=174 N
Explanation:
Given Data
L (Phone Cord Length)=4.89 m
m (Cord Mass)=0.212 Kg
T (Time for four trips)=0.617 s
Tension=?
Solution
V=λ×f
1 moles CO2, or 44.0095 grams<span>.</span>
On a velocity - time graph, if the line crosses the x - axis it depicts that the object has started moving in the opposite direction.
Answer:
F= 9492.12 N
Explanation:
Given that
mass, m = 1598 kg
Initial velocity ,u= 0 km/h
Final velocity v= 93.9 km/h
v =26.08 m/s
Distance ,d= 57.2 m
We know that
v² = u² + 2 a d
a=acceleration
u=initial velocity
v= final velocity
d=distance
26.08²= 0² + 2 x a x 57.2
a= 5.94 m/s²
We know that
Force = mass x acceleration
F= m a
F= 5.94 x 1598 N
F= 9492.12 N
3] A snowball picks up speed as it rolls down the mountain.
Explanation:
Newton's second law states that:
where
F is the net force acting on an object
m is the mass of the object
a is the acceleration of the object
When the net force acting on the object is zero, we say that the object is acted upon balanced forces; when the net force is non-zero, we say that unbalanced forces are acting on the object. From the formula, we see that when unbalanced forces are acting on the object, the object has an acceleration different from zero: this also means that the velocity of the object is changing.
So, we can say that if there are unbalanced forces, then the object's velocity is changing. Among the choices given, we see that velocity is changing only in options 3) (the snowball is speeding up, so it has an acceleration), while in all other cases the velocity is constant. Therefore, option 3) is the correct one.