Hello.
The answer is
"Acting as a reference point for detecting motion" Julie wants to know if the snail moves throughout the day so she places a mark next to the snail which will determine if the snail moved from that spot.
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Answer:
Explanation:
a) ωp = 2π radians / 1.7 s = <u>3.7 rad/s</u>
b) ωs = 3.7 rad/s(9.5 cm / 4.5 cm) = 7.8 rad/s
v = (ωs)R = 7.8(65) = 507 cm/s or <u>5.1 m/s</u>
c) ωs = 3.5 m/s / 0.65 m = 5.38 rad/s
ωp = 5.38(4.5 cm / 9.5 cm) = 2.55 rad/s
t = θ/ω = 2π / 2.55 = 2.463... <u>2.5 s</u>
Answer:
F = 33.12 N
Explanation:
given,
first force = 15 N is oriented at 58.0° counterclockwise
second force = (−19.0 N,18.5 N)
x-component of first force = 15 cos 58.0° = 7.95 N
y-component of second force = 15 sin 58.0° = 12.72 N
second component
now,
F netx = 7.95 - 19 = -11.05 N
F nety = 12.72 + 18.5 = 31.22 N
F = 33.12 N
θ = -70.51°
From Newton's second law of motion,
F = m*a
= m * (change in velocity)/time [As a = (change in velocity)/time]
From the question, we know
F = 400 N, time = 5 s
Therefore,
400 = 1000 * (change in velocity)/5
i.e. change in velocity = 2 m/s
Momentum = m * velocity
Therefore,
Change in momentum = (change in mass) * (change in velocity)
= 1 * (change in velocity) [As m remains the same]
= 1 * 2
= 2 kgm/s