Answer:
Velocity Has vector Quantity
We can compare the two by their kinetic energies. The kinetic energy is the energy when an object
is in motion. It is expressed as the product of the mass of the object and the
square of the velocity divided by two. We assume a velocity of 1 m/s for this problem.<span>
KE = mv^2/2
KE1 = 10 (1)^2
KE1 = 10 J
KE2 = 1(1)^2
KE2 = 1 J
Therefore, c</span><span>ompared to the 10 kg ball, the 1 kg ball has lesser kinetic energy.</span>
Answer:
a. distance = s x t
Explanation:
The equation we know for speed is speed = distance/time, shortened to s = d/t
If you want to find the distance, you'd rearrange the formula to make d the subject. To isolate d, multiply by t on both sides (since it's being divided on the right. This leads to
s x t = d, with d isolated on the right side.
Therefore, to find the distance an object travelled you'd use a. distance = s x t
Answer:
vf = 12.51 m/s
Explanation:
Newton's second law to the grocery cart:
∑F = m*a Formula (1)
∑F : algebraic sum of the forces in Newton (N)
m : mass s (kg)
a : acceleration (m/s²)
We define the x-axis in the direction parallel to the movement of the grocery cart and the y-axis in the direction perpendicular to it.
Forces acting on the grocery cart
W: Weight of the block : In vertical direction downward
N : Normal force : In vertical direction upward
F : horizontal force
Calculated of the mas of the grocery cart (m)
W = m*g
m = W/g
W = 94.0 N , g = 9.81 m/s²
m = 94/9.81
m = 9.58 Kg
Calculated of the acceleration of the grocery cart (a)
∑F = m*a
F = m*a
42.6 = (9.58)*a
a = (42.6) / (9.58)
a = 4.45 m/s²
Kinematics Equation of the grocery cart
Because the grocery cart moves with uniformly accelerated movement we apply the following formula to calculate its final speed :
vf²=v₀²+2*a*d Formula (2)
Where:
d:displacement (m)
v₀: initial speed (m/s)
vf: final speed (m/s)
a: acceleration (m/s²)
Data:
v₀ = 0
a = 4.45 m/s²
d = 17.6 m
We replace data in the formula (2) :
vf²=v₀²+2*a*d
vf² = 0+2*(4.45)*(17.6)
vf² = 156.64

vf = 12.51 m/s
Question:
Assumptions
Voltage of battery = 24 V
Resistance on the right,20Ω parallel to 10 Ω resistor
Answer:
For the current out of the battery to be the same as when the switch was opened with the switch closed, the resistance on the resistor on the right must be approximately 20/3 Ω
Explanation:
We note that the switch in the assumption is on the same line as the 20 Ω resistor.
With a voltage of 24 V, and the switch closed, we have;
Total resistance = 
Current out of voltage, I = Voltage/(total resistance)
= 24 ÷ 20/3 = 24 × 3/20 = 18/5 A
Therefore, with the switch opened, we get
Resistance on the right = Initial total resistance 
Therefore, with the switch opened, the resistance on the resistor on the right must be approximately equal to the resultant resistance of the two resistances in parallel.