Answer:
The average force that the shooter must exert to prevent the weapon from moving is 21.7 Newtons.
Explanation:
m=33g=0,033kg
V= 342 m/seg
115 bullets/min= 1 bullet every 0.52 seconds.
By the principle of momentum and amount of movement we have to:
F*t=m*V
F= (m*V)/t
F= (0.033kg * 342 m/s) / 0.52 sec
F= 21.7 Newtons
Answer:
197 hits/s
Explanation:
If the record is turning at the rate of 33 rev/min that means it's turning
If the groove is being played at radius of 10 cm (or 0.1m), that means the record is rotating with the speed of:
The goove bumps is uniformly separated at 1.75 mm(or 0.00175m/bump) bumps. So the number of hits per second it should be
Th equations to be used here are the following:
a = (v - v₀)/t
x = v₀t + 0.5at²
The speed of the fugitive is the sum of his own speed plus the speed of the train. Thus,
v₀ = 0 + 5.5 m/s = 5.5 m/s
v = 8 m/s + 5.5 m/s = 13.5 m/s
a.) We use the first equation to determine time
2.5 m/s² = (13.5 m/s - 5.5 m/s)t
Solving for t,
t = 3.2 seconds
b.) We use the answer in a) and the 2nd equation:
x = (5.5 m/s)(3.2 s) + 0.5(2.5 m/s²)(3.2 s)²
x = 30.4 meters
Answer:
e telescopes
Explanation:
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