a
soccer ball is kicked by Lionel Messi with initial velocity of 80
m/s and angle of 45 degrees. a,)velocity and angle of ball at
height of 30 m b.) velocity and angle of ball 4 s after
projection
A football is kicked at ground level with a speed of 25 m/s at
an angle of 45 degrees to the horizontal. How far down field does
it go (assume takeoff and landing at the same height)?
A rock is thrown with an initial velocity of 30 m/s at an angle
of 60° above the horizontal from a height of 1.5 m toward a cliff.
After 4 seconds, the rock lands on the top edge of the cliff.
(a) Calculate the height of the cliff.
(b) Calculate the maximum height reached by the rock along its
trajectory
(c) Determine the speed of the rock just before hitting the
cliff.
ball is kicked with an initial velocity of 21 m/s in the
horizontal direction and 13 m/s in the vertical direction. (Assume
the ball is kicked from the ground.)
(a)
At what speed (in m/s) does the ball hit the ground?
m/s
(b)
For how long (in s) does the ball remain in the air?
s
(c)
What maximum height (in m) is attained by the ball?
m
An object is launched with an initial velocity of 50.0 m/s at a
launch angle of 36.9∘ above the horizontal.
Determine x-values at each 1 s from t = 0 s to t = 6 s.
Determine y-values at each 1 s from t = 0 s to t = 6 s.
Determine vx-values at each 1 s from t = 0 s to t = 6 s.
Determine vy-values at each 1 s from t = 0 s to...
An object is launched with an initial velocity of 50.0 m/s at a
launch angle of 36.9? above the horizontal.
A.Determine x-values at each 1 s from t = 0 s to t = 6 s.
B.Determine y-values at each 1 s
from t = 0 s to t = 6 s.
C.Determine vx-values at each 1 s
from t = 0 s to t = 6 s.
D.Determine vy-values at each 1 s
from t = 0 s to...
A stone is thrown with an initial velocity of 35.0 m/s at an
angle of 37 degrees above the horizontal. Find: (a) its horizontal
and vertical displacement after 0.55 s; (b) its velocity after 0.55
s (both magnitude and direction). (c) its maximum height and
range.
A ball is thrown upward with initial velocity v0 = 15.0 m/s at
an angle of 30° with the horizontal. The thrower stands near the
top of a Jong hill which slopes downward at an angle of 20°.
Determine how far down the slope the ball strikes.
A 75kg snowboarder has an initial velocity of 5.0 m/s at the top of a 28°
incline. After sliding down the 110m long incline (on
which the coefficient of kinetic
friction is μk=0.18), the snowboarder has attained a velocity v.
The snowboarder then slides
along a flat surface (on which μk=0.15) and comes to a rest after a
distance x.
a. Use energy calculations to determine x.
b. Use Newton’s 2nd Law to find the snowboarder’s acceleration
while on the...
A rock is thrown with an initial vertical velocity component of
30 m/s and an initial horizontal velocity component of 40 m/s.
a. What will these velocity components
be one second after the rock reaches the top of its path?
b. Assuming the launch and landing
heights are the same, how long will the rock be in the air?
c. Assuming the launch and landing
heights are the same, how far will the rock land from where it was
thrown?...