3 years ago

What is the mass of an object moving at a speed of 9.0 m/s with a kinetic energy of 200 J?

Physics

1 answer:

Yuliya22 [10]3 years ago

8 0

Ek= 1/2mv²
200=1/2 m(9 ²)
200=1/2(81)m
200=40.5m
m=200/40.5
m=4.93kg

Answer: 4.9 kg (second option)

You might be interested in

How much electrical energy is used by a 400 W toaster that is operating for 5

Setler [38]

Answer:

The electrical energy consumed by a toaster is 0.033 Kwh.

Explanation:

The power utilized by the toaster is 400 W.

The toaster is operated for 5 Minutes.

We know that,

Substitute the values in the above formula to obtain electrical energy,

Electrical energy = 0.4 × 0.083

Electrical energy is 0.033 Kwh.

6 0

3 years ago

Read 2 more answers

An optical telescope is an instrument that collects and _____.

tresset_1 [31]

An optical telescope is an instrument that collects and enlarges objects from a distance. Hope this helps. Hope this helps. (∩︵∩)
(｡◕‿◕｡)

4 0

4 years ago

Garen is climbing stairs to the castle. He travels a distance of 350 stairs in 5 minutes of time.

KATRIN_1 [288]

The Answer Is 70:1
Hope This Helps You.

6 0

3 years ago

Read 2 more answers

Acid rain is caused by human activity. Please select the best answer from the choices provided T F

olasank [31]

It is actually caused by the environment, so its false. :)

5 0

3 years ago

A boat is able to move through still water at 20 m/s. It makes a round trip to a town 3.0 km upstream. If the river flows at 5m/

Salsk061 [2.6K]

Answer:

Option e) 320 s

Explanation:

Here, distance = 3.0 km = 3000 m

The velocity of boat when it is going upstream;

Upstream velocity = velocity of boat in still water - velocity of river flow

So, Upstream velocity $=20m/s-5m/s=15m/s$

So,Time to go upstream

$(t_{1}) =\frac{Distance}{Velocity}=\frac{3000m}{15m/s} =200 s$

The velocity of boat when it is going downstream;

Downstream velocity = velocity of boat in still water + velocity of river flow

So, Downstream velocity $=20m/s+5m/s=25m/s$

So,Time to go downstream

$(t_{2}) =\frac{Distance}{Velocity}=\frac{3000m}{25m/s} =120 s$

So, total time (t) = $t_{1}+t_{2}=200s+120 s=320s$

Option E is the correct answer.

3 0

4 years ago

Read 2 more answers