Physics, 06.11.2020 23:30 rileyeddins1010
Objects A and B are dropped from rest near the Earth's surface. Object A has a
mass m and object B has a mass of 2m. After 2 seconds of free fall, object A has a speed v and has fallen a distance d. What are the speed and distance of fall of
object B after 2 seconds of free fall? (neglect air resistance)
A.) speed = v; distance = d.
B.) speed = v/2; distance = 2d
C.) speed = v/2; distance = d/2
D.) speed = 2v; distance = 2d
Answers: 2
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Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)
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Objects A and B are dropped from rest near the Earth's surface. Object A has a
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