The final velocity of the man standing on roller skates with the ball caught, after it is thrown at him at a speed of 5 m/s, is 0.042 m/s.
The velocity of the man with the ball can be calculated by conservation of linear momentum:
Where:
: is the mass of the ball = 0.5 kg
: is the <u>mass</u> of the man = 59.5 kg
: is the initial velocity of the <u>ball</u> = 5 m/s
: is the <u>initial velocity</u> if the <u>man</u> = 0 (he is standing still)
: is the final velocity of the <u>ball</u> =?
: is the <u>final velocity</u> of the <u>man</u> =?
Since the man catches the ball, his final velocity is the same that the final ball's velocity, so:
Therefore, the velocity of the man with the ball is 0.042 m/s.
Learn more about the conservation of linear momentum here:
I hope it helps you!
Refer to the diagram shown below.
The net force acting on the vehicle is
F - R = 1060 -1010 = 50 N
The distance traveled is 21 m. Because the force is constant, the work done is
W = (50 N)*(21 m) = 1050 J
Assume that energy is not dissipated by air resistance or otherwise.
Conservation of energy requires that W = KE, where KE is the kinetic energy of the vehicle.
The KE is
KE = (1/2)*(2000 kg)*(v m/s)² = 1000v² J
Equate KE and W to obtain
1000v² = 1050
v² = 1.05
v = 1.025 m/s
Answer: 1.025 m/s
Yes glass is an insulator
Answer:
The speed is 33.5 m/s.
Explanation:
Given that,
Mass = 0.064 kg
Wavelength 
We need to calculate the speed
Using formula of he de Broglie wavelength
Where, h = Planck constant
m = mass
= wavelength
Put the value into the formula
Hence, The speed is 33.5 m/s.
Metamorphic Rock - Forms when pressure, temperature, or chemical processes change existing rock. Igneous Rock - forms when magma or lava cools and hardens to become solid. Sedimentary Rock - Form when minerals that form from solutions or sediment from older rocks get pressed and cemented together. The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble. Hope this helps!
