Answer: 6.48m/s
Explanation:
First, we know that Impulse = change in momentum
Initial velocity, u = 19.8m/s
Let,
Velocity after first collision = x m/s
Velocity after second collision = y m/s
Also, we know that
Impulse = m(v - u). But then, the question said, the guard rail delivered a "resistive" impulse. Thus, our impulse would be m(u - v).
5700 = 1500(19.8 - x)
5700 = 29700 - 1500x
1500x = 29700 - 5700
1500x = 24000
x = 24000/1500
x = 16m/s
Also, at the second guard rail. impulse = ft, so that
Impulse = 79000 * 0.12
Impulse = 9480
This makes us have
Impulse = m(x - y)
9480 = 1500(16 -y)
9480 = 24000 - 1500y
1500y = 24000 - 9480
1500y = 14520
y = 14520 / 1500
y = 9.68
Then, the velocity decreases by 3.2, so that the final velocity of the car is
9.68 - 3.2 = 6.48m/s
Answer:
44 1/3 cm
Explanation:
The cube has an edge length of ∛0.027 m = 0.3 m, so a center of mass (CoM) 15 cm above the floor.
The sphere's center of mass is 40 cm above the top of the cube, so is 70 cm above the floor. The weighted average of the CoM locations is ...
((15 cm)(0.700 kg) +(70 cm)(0.800 kg))/(0.700 kg +0.800 kg)
= (10.5 kg·cm +56 kg·cm)/(1.500 kg) = 44.333... cm
The center of mass of the two-object system is 44 1/3 cm above the floor.
_____
<em>Comment on the units</em>
We're not familiar with "hcm" as a unit. We presume that you can convert the given answer to the units you desire.
Given:
m = 5.00x10^-7 kg
q = 3.00<span>μC
To determine the velocity, use this formula
</span>
v = √(2qΔx/m)
Now, solve for the velocity, substitute the given values to the equation
v = √(2(3.00μC * 0.600m/5.00x10^-7 kg)
Solve for V and this is the velocity of your sphere in condition 1. <span />
Answer:
a.) At their highest point, both of them have the same amount of mechanical energy.
Explanation:
Grasshopper A jumps upwards with speed v while grasshopper B jumps at an angle of 66 degree with horizontal at same speed
so vertical speed of B is given
So when both the grasshopper will jump upwards they both will attain different maximum heights
Since initial speed of both grasshopper is same so their mechanical energy is always conserved
So mechanical energy of grasshopper A is given as
Mechanical energy of grasshopper B is given as
So we have
a.) At their highest point, both of them have the same amount of mechanical energy.
Answer:
Competitive forces model
Explanation:
A Competitive forces model is the important tool which is used in the strategic analysis to determine the competitiveness in an organization. The model is commonly known as the "Five Force Model of Porter", which includes five forces — intensity of a rivalry, the bargaining ability of the buyers, threat of the potential new entrants, the bargaining power of a supplier, and the threat of substitute goods or services.
It affects the organizations's ability to compete as well as the strategy to succeed.
