Answer:
The two forces acting on the object are weight due to gravity pulling the object towards earth, and drag resisting this motion. When the object is first released, drag is small as velocity is low, so the resultant force is down. This means the object accelerates towards earth.
Answer:
4.38 m/s^2
Explanation:
If,
Initial velocity(u) is 9.2 m/s
Final velocity (v) is 19.1 m/s
Distance moved(s) in that period is 32 m
Therefore we use the formula,
v^2 = u^2 + 2as
; (19.1)^2 = (9.2)^2 + 2(32)a...then move the variables without a to one side..,
; 280.17 = 64a...then divide both sides by 64
; Acceleration = 4.38 m/s^2
the answer would be B) displacement of particles is perpendicular to the direction of wave motion
Answer:
The value of R and the internal resistance of the battery are 10.6 ohm and 2.45 ohm
Explanation:
Given that,
Emf of battery = 15.0 V
Voltage = 12.2 V
Power = 14.0 W
(a). We need to calculate the value of R
Using formula of power
Where, R = resistance
P = power
V = voltage
Put the value into the formula
(b). We need to calculate the internal resistance of the battery
Firstly we calculate the current
Using formula of current
Put the value of P and V into the formula
We calculate the internal resistance
Using formula of emf
Put the value into the formula
Hence, The value of R and the internal resistance of the battery are 10.6 ohm and 2.45 ohm
Answer:
d = vi * t + ½ * a * t^2, a = -0.5
d5 = 20.8 * 5 – ½ * 0.5 * 5^2 = 91.5 m
d6 = 20.8 * 6 – ½ * 0.5 * 6^2 = 106.8m
d6 – d5 = 15.3 m
Explanation: