distance is the total length of an object's path. displacement is the overall change in position, ie. how far an object is from its initial position.
the court is 30 m long, so a path going back and forth once is 60 m long. going along this path 6 times totals 360 m.
the end point is the same as the starting point, so the displacement is 0 m.
speed = (change in distance) / (time for the change)
distance from top to bottom of segment c = (6 - 0) = 6 m
time from beginning to end of segment c = (14 - 4) = 10 s
speed = (6 m) / (10 s)
speed = 6 m/s
answer: the increase in temperature of the nail after the three blows is 8.0636 kelvins. the correct option is (d).
kinetic energy of the hammer ,k.e.=
half of the kinetic energy of the hammer is transformed into heat in the nail.
energy transferred to the nail in one blow =
total energy transferred after 3 blows,q =
mass of the nail = 15 g = 0.015 kg
change in temperature =
specif heat of the steel = c = 448 j/kg k
the increase in temperature of the nail after the three blows is 8.1 kelvins.hence, correct option is (d).
potential energy = mass * gravitational constant * height
what we don't know: potential energy
what we know:
gravitational constant (9.8 m/s)
ep = mgh
ep = 4 * 9.8 * 2
ep = 78.4 joules
the potential energy of the rock is 78.4 joules, based on the given information! hope this you!
in the formula used to calculate standard deviation, v
, what does x...