about 112 miles per hour
thanks!
1600, equal 40m*40m
8488438821232111113% 40%
By Newton second law, F=ma; 20=5*a; or a=4m/s/s. initial velocity=0 and time=10s so by first equation of motion V=0+at, so V=4*10=40m/s, so kinetic energy of body=K.E=1/2*m*V2 = 0.5*5*1600=25*160=.....
Interesting! Horizontal distance covered by arrow=20m=Vx(t),put Time=t=0.5s, so Vx=20/.5=40m/s.Now let us consider vertical motion of the arrow,Vertical distance=4m-1m=3m. so Use Second equation of motion now.Y=Vy(t) - gt2/2.Subtituting the values,3=Vy(0.5) - 9.8(.5)2/2. Solving for Vy, we get,Vy= 8.45m/s and Vx=40m/s. nowV2=(Vx2+Vy2) or V2=(8.45)(8.45)+(40)(40)=71.40+1600=1671.40m/s, soV=(1671.40)1/2=40.88m/s. That is the answer!
Kinetic energy is dependent on which point you are talking about. When it is about to be dropped, kinetic energy is zero. When it reaches almost hits the ground, there is maximum kinetic energy.
Using the acceleration formula, final acceleration is the final velocity minus the initial velocity over elapsed time. Final velocity you gave as 40m/s, and the initial velocity was zero (the apple was stationary on the tree), so the difference is 40 m/s. Divided by the time you gave, 4 s, this will be 10 m/sĀ²
Ignoring air resistance and using g = 9.81 ms-2, velocity = 20.38 ms-1.
a train staring from rest acquires a velocity of 40m/s in 10sec.what is its acceleration
To calculate the volume of a rectangular prism, you multiply the length, width, and height. 40m Ć 40m Ć 60m = 96, 000 m3.
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1600, equal 40m*40m
0.0254 m = 1 in (exactly) → 40m = 40 ÷ 0.0254 in ≈ 1574.8 in
40m
I just turned 13, I'm a little bit faster than average and I got 6.35. But the 40m sprint is completely irrelevent to 100m cause I got 15.72 in the 100m and my friend (who got 6.39 in the 40m) got 14.96. So the 40m sprint is just about accelaration not speed.
40km
It is: 80%
No