Answer:
3.042 m/s
Explanation:
To solve this exercise it is necessary to use the Work equation and the conservation of kinetic energy in the Ice skater.
According to the description of the problem, all the work is done from north to south due to the wind direction. In this way, finding the force in this component we have,
Through the kinetic energy equations we have to
Re-arrange for
Therefore te speed after gliding 100m in this wind is 3.042m/s
We can solve the problem by using Ohm's law, which states that an Ohmic conductor the following relationship holds:
where
is the potential difference applied to the resistor
I is the current flowing through it
R is the resistance
In our problem, I=4.00 A and
, so the potential difference is
Answer:0.58 m
Explanation:
The initial velocity of the ball is u = 2.0 m/s
The height of the table is, h = 1.0 m
The ball falls in vertical direction under acceleration due to gravity.
Time taken for ball to hit the floor:
h= ut + 0.5gt² ( from the equation of motion)
1.0 m=2.0 m/s × t+0.5 × 9.8 m/s²× t²
Solving this for t,
t = 0.29 s ( we have neglected the negative value of t)
In the same time, the ball would cover a horizontal distance of :
s = u t
⇒s = 2.0 m/s×0.29 s = 0.58 m
Thus, the landing spot is 0.58 m away from the table.
Answer:
Explanation:
submerged volume of pump = 40 x 12⁻³ ft³
density of oil = .9 x 62.4 lb ft⁻³ ( specific gravity x density of water )
mass of displaced oil = 40 x 12⁻³ x .9 x 62.4 lb
= 1.3 lb
buoyant force = 1.3 lb
weight of pump = 14.6 lb
extra force needed for balancing pump by spring
= 14.6 - 1.3
= 13.3 lb .
Answer:
A
Explanation:
A tendency to do nothing or to remain unchanged.
A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.