What is the speed of the cart if the man suddenly starts running to the left with a speed of 10.0 m/sm/s relative to the cart

If an object triples its velocity, how does this effect its KE?

lara31 [8.8K]

If an object triples its velocity then the kinetic energy become 9 times the initial kinetic energy. i hope this helped!

3 0

2 years ago

whirl a rock at the end of a string and it follows a circular path. if the string breaks, the tendency of the rock is to

bixtya [17]

Answer:

whirl a rock at the end of a string and it follows a circular path. if the string breaks, the tendency of the rock is to stop

8 0

2 years ago

A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius o

Setler79 [48]

Answer:

21.8 m/s

Explanation:

At the top of the hill (crest), there are two forces acting on the motorcycle:

- The reaction force of the road, N (upward)

- The force of gravity, mg (downward)

Since the motorcycle is moving by circular motion, the resultant of these forces will give the centripetal force, so:

$mg-N = m\frac{v^2}{r}$

where the direction of the weight (mg) is equal to that of the centripetal force, and where

m is the mass of the cycle

g = 9.8 m/s^2 is the acceleration of gravity

v is the speed

r = 48.6 is the radius of the hill

The cycle loses contact with the road when the reaction force becomes zero:

N = 0

Substituting into the equation, we therefore find the maximum speed that is allowed for the cycle before losing constact:

$mg = m\frac{v^2}{r}\\v=\sqrt{gr}=\sqrt{(9.8)(48.6)}=21.8 m/s$

6 0

2 years ago

A doctor pushes the plunger of syringe down and then pulls it up to a draw liquid into a syringe? give reason please help me wit

ruslelena [56]

Answer:

When the doctor has the syringe, it is full of air. So, now after the doctor pushes the plunger, hence the air gets released into the medicine container. After this the doctor then takes the plunger and pull it back. Now , the air gets pulled up back into the syringe, but not only does the air come in but also the medicine because of the pressure build up.

If my answer helped, please mark me as the brainliest!!

Thank You!

4 0

3 years ago

A car starts from rest with an acceleration of 5 ft/s. What is its velocity after it has gone 600 ft?

Soloha48 [4]

Answer:

First, let’s correct the question. Acceleration is the rate of change in velocity. Its unit therefore is ft/sec/sec. If S is the distance traveled for a given duration, S = Vot + (1/2)at^2 where Vo is the initial velocity, a is the acceleration and t is the time. For Vo = 0, a = 6m/sec/sec and t = 3 sec. The distance traveled is S = 0 + (1/2) x 6 x 3^2 = 27 meters

3 0

2 years ago