All categories

3 years ago

A 1,000 kg car is driving on a 15 m high bridge at 5 m/s. What is the kinetic energy of the car?

Physics

1 answer:

yanalaym [24]3 years ago

7 0

Answer:

$KE=12,500J$

Explanation:

The formula for kinetic energy is:

$KE = \frac{1}{2}mv^2$

We can plug in the given values into the equation:

$KE = \frac{1}{2}*1000kg*(5m/s)^2$

$KE = 500kg*25m^2/s^2$

$KE=12,500J$

You might be interested in

A remote-controlled, pilot-operated ___ valve is type of pilot-operated relief valve that uses one or more external pilot valves

andrezito [222]

Answer:

A remote-controlled, pilot-operated _Relief__ valve is type of pilot-operated relief valve that uses one or more external pilot valves to set the pressure at which the relief valve will open.

3 0

3 years ago

An object is dropped from 600 m. If it is initially at rest and achieves a top speed of 45 m/s just as it hits the ground, what

Brums [2.3K]

Answer:

1.68m/s^2

Explanation:

using V^2=U^2+2×a×s formula.

If,

(Final Velocity)V=45

(Initial Velocity)U=0 because it starts from rest

(Distance)S=600m

(acceleration)a= ?

now,

using formula,

45^2=0^2+2×a×600

2025= 1200a

a=2025÷1200

a = 1.68m/s^2(The unit of acceleration is m/s^2)

Therefore the acceleration is 1.68m/s^2

Hope it works !!!

3 0

3 years ago

Read 2 more answers

What TA makes something a good insulator?

Natali5045456 [20]

Creativity because its something cool

6 0

3 years ago

4 newtons, 4 amps, 4 joules, 4 watts, 4 ohms, 4 volts<br> what does I=

Ganezh [65]

Answer:

I $= 4$ amperes

Explanation:

Newton is the unit of force. Hence 4 newton is not the current “I”

Joules is the unit of energy and hence it do not signify current I

Watt is the unit of power i.e the rate of transfer of energy.

Ohm is the unit of resistance produces thereby obstructing the flow of current

And Volts is the unit of voltage or potential difference between two ends of an electric circuit. Thus, it is also does not signifies current.

Thus, I $= 4$ amperes

4 0

3 years ago

32. A forest ranger. 35 meters above the ground in a

Sphinxa [80]

Answer:

x = 102.33 m

Explanation:

Given that,

Position where a forest ranger stands is 35 m above the ground. The angle of depression to the base of the fire is 20. We need to find how far from the tower is the fire.

Let the distance is x. We can find x using trigonometry as follows :

$\sin\theta=\dfrac{\text{perpendicular}}{\text{hypotenuse}}\\\\\sin(20)=\dfrac{35}{x}\\\\x=\dfrac{35}{\sin(20)}\\\\x=102.33\ m$

Hence, the fire is at a distance of 102.33 m from the fire.

8 0

3 years ago