<span>Hi,</span>
<span>The amount of forces that act on submered body are two, buoyancy and the force from the gravity.</span>
Answer:
v = 3.7 m/s
Explanation:
As the swing starts from rest, if we choose the lowest point of the trajectory to be the zero reference level for gravitational potential energy, and if we neglect air resistance, we can apply energy conservation as follows:
m. g. h = 1/2 m v²
The only unknown (let alone the speed) in the equation , is the height from which the swing is released.
At this point, the ropes make a 30⁰ angle with the vertical, so we can obtain the vertical length at this point as L cos 30⁰, appying simply cos definition.
As the height we are looking for is the difference respect from the vertical length L, we can simply write as follows:
h = L - Lcos 30⁰ = 5m -5m. 0.866 = 4.3 m
Replacing in the energy conservation equation, and solving for v, we get:
v = √2.g.(L-Lcos30⁰) = √2.9.8 m/s². 4.3 m =3.7 m/s
Answer:
a = 0.55 m/s/s
Explanation:
As the car accelerates in forward direction the string will make some angle with the vertical direction
So here horizontal component of the tension force will accelerates the dice in forward direction along with the car
Vertical component of the tension force will balance the weight of the dice
so we will have
here we know that
= angle made with the vertical by string
now divide the two equations
so we have
Answer:
80 volts.
Explanation:
From the question,
Applying Ohm's law
V = IR...................... Equation 1
Where V = Voltage, I = maximum current of the bulb, R = Resistance of the bulb.
Given: I = 10 A, R = ohms
Substitute these values into equation 1
V = 10×8
V = 80 volt.
Hence the voltage that can be applied is 80 volt.
Runner A is faster than runner B
Runner B has a head start