<u>Any time the coin is on the table:</u>
-- gravity acting downwards
-- normal force of the table, acting upwards
<u>Any time the coin is moving:</u>
-- friction force, on the coin's underside
-- air resistance
Both of these act opposite to the direction of the coin's motion.
<u>During the flick, while your finger is still touching the coin:</u>
-- the flicking force, a push exerted by your finger
The force ends as soon as the coin leaves contact with your finger.
Considering that the grasshopper starts on the ground and lands on the ground, there is no change in elevation. The range of the grasshopper is given by: <span>R=<span><span><span>v2</span>sin2θ</span>g</span></span>
If we now take the information that this is a maximal distance, the maximum range is given when the angle of launch is 45 degrees. This yields the equation: <span><span>R<span>max</span></span>=<span><span>v2</span>g</span></span>
We know R_max=0.4 m and g=9.8 m/s^2, so we can solve for v: <span>v=1.98m/s</span>
We are asked for the horizontal component, which by trigonometry is: <span><span>vx</span>=vcosθ</span>
We again take our angle of launch as 45 degrees and arrive at: <span><span><span>vx</span>=1.40m/s</span></span>
Answer:v=0.4 m/s
Explanation:
Mass hockey player
mass of cup
Velocity of cup
let v be the velocity of the combined system
Conserving momentum
Answer:
The loss in mechanical energy is 668.25 J
Explanation:
As per the question:
Mass of the base runner, m = 66 kg
Velocity of the runner, v = 4.5 m/s
Coefficient of friction,
Now,
The mechanical energy lost due to friction is provided by the work done in the form of the Kinetic energy of the runner:
Work done, W = Kinetic enrgy of the runner
W =
W =
Work done must be - 668.25 J as the runner slows down.
Answer:
What inferences can you make about the melting points of the different substances and the motion of their particles, based on the data? (ignore that needed it here so i could see it better.)
Explanation:
Butter has a lower melting point than the cheese and the wax. The motion of the cheese were a little separated while the butter articles have more space in between. The wax had the closest particles.
I dont know if that makes sense?