Answer:
The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Explanation:
Hi there!
The equation for the velocity of an object thrown upward is the following:
v = v0 + g · t
Where:
v = velocity of the ball.
v0 = initial velocity.
g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).
t = time.
To find the velocity of the ball at t = 0.40 s, we have to replace "t" by 0.40 s in the equation:
v = v0 + g · t
v = 3.0 m/s - 9.8 m/s² · 0.40 s
v = -0.92 m/s
The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Answer:
A. 12,240.
Explanation:
1,530 times 8.0 = 12,240.
hope this helped :)
Explanation :
The full form of laser is Light Amplification by Stimulated Emission of Radiation. It has particles of very high energy. It points in one direction.
Greg is giving a slide show presentation to a large audience. It is very important to make the presentation informative. By using a laser, we can focus on the important part of the presentation. So that we can highlight the important points.
Are there options, because I believe the answer is D.
Answer:
on the planet
on earth
Explanation:
Given:
- initial velocity of the tool before pushing,
- force applied on the tool,
- displacement of the tool,
- time taken for the displacement,
- height of releasing the tool,
- time taken by the tool to fall on the ground,
<u>Now using the equation of motion:</u>
where:
a = acceleration of the object
Now the mass of the tool:
<u>Using the equation of motion when the tool is dropped:</u>
here:
g = acceleration due to gravity on the planet
Weight of the tool in the planet:
Weight of the tool on the earth:
