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VladimirAG [237]
3 years ago
15

If you designed a rollercoaster, how might you design it? Would you have friction?

Physics
1 answer:
kvasek [131]3 years ago
4 0
Yes, because you would need friction to slow down the rollercoaster to a stop. 
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A 10.0 g bullet moving at 300m/s is fired into a 1.00 kg block at rest. The bullet emerges (the bullet does not get embedded in
chubhunter [2.5K]

Answer:

v' = 1.5 m/s

Explanation:

given,

mass of the bullet, m = 10 g

initial speed of the bullet, v = 300 m/s

final speed of the bullet after collision, v' = 300/2 = 150 m/s

Mass of the block, M = 1 Kg

initial speed of the block, u = 0 m/s

velocity of the block after collision, u' = ?

using conservation of momentum

 m v + Mu = m v' + M u'

 0.01 x 300 + 0 = 0.01 x 150 + 1 x v'

v' = 0.01 x 150

v' = 1.5 m/s

Speed of the block after collision is equal to v' = 1.5 m/s

5 0
3 years ago
The velocity - time graph of a ball of mass 25g moving on road is as given below:
Airida [17]
25g of mass will require 25g of opposite force on the ball from the road and opposition is moving upward to work on the ball 
4 0
3 years ago
a car moves 6 km east, then 4km north. what was the distance covered? What was the total displacement?
Aliun [14]

Answer:

distance= 10 km

displacement= 7.21 km

Explanation:

distance= scalar (only magnitude)

displacement= vector (magnitude & direction)

distance= 6 km+ 4 km

= 10 km

displacement= shortest difference btwn 2 pts=

sqrt( 6^2+4^2)

sqrt(52)

7.21 km

7 0
3 years ago
When θ= 0 ̊, the assembly is held at rest, and the torsional spring is untwisted. if the assembly is released and falls downward
Georgia [21]
Rod is 450mm and disk has a radius of 75mm So there is a pin holding the assembly upwards which is when Θ=0 and at the pin there is a torsional spring with constant of k=20N m/rad. One end of the rod is attached to the pin and the other is attached to the disk.


7 0
3 years ago
What is a light-year?
Korvikt [17]
It’s the last choice
8 0
3 years ago
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