Answer:
69.28N
Explanation:
horizontal force
Cos 60°= F(horizontal)/80N
If we cross multiply, we have
F(horizontal)= 80 cos 60°
= 40N
vertical forces
Sin 60°= F(vertical)/80N
If we cross multiply we have
F( vertical) = 80 sin 60°
= 69.28N
Therefore, the vertical force is 69.28N
White light is all the colours of light combined. When the droplets act like prisms, they split the white light into all its colours and also slightly bend the different colours. This is how a rainbow is formed.
Explanation:
it can be safely concluded that an object moving in a circle at constant speed is indeed accelerating. It is accelerating because the direction of the velocity vector is changing.
When an object is moving with constant velocity, it does not change direction nor speed and therefore is represented as a straight line when graphed as distance over time.
Answer:
s = mV/2b
Assumptions: 1. the darts finally velocity is zero
2. The force being exerted on the dart by the block is constant and so the dart moves through the block with constant acceleration in the opposite direction. (Newton's second law)
3. Since the acceleration of the dart through the block is constant, then the equations of constant acceleration motion apply to the motion of the dart through the block.
Explanation:
Let a = acceleration of the dart through the block
V = velocity of the dart
m = mass of the dart
Vf = finally velocity of the dart
S = distance traveled by the dart through the block.
From Newton's second law of motion which states that the acceleration of a body is in the same direction as the net force acting on the body and is equal to the force divided by the mass. That is F = ma
Also F = -bv ........(1)
Therefore -bv = ma........(2)
From the equals of constant acceleration motion, Vf² = V² + 2aS
Vf = 0
0² = V² + 2aS
-2aS = V²
a = -V² / 2S
Substituting this expression for a in
Equation (2) above
-bV = m( - V²/2S)
On rearranging,
S = mV/2b
