Answer:
a) 16.4 m/s
b) 16.4 m/s
c) 16.4 m/s
Explanation:
a)
m = mass of the snowball = 0.690 kg
h = height of the cliff = 8.25 m
v₀ = initial speed of ball at the time of launch = 10.3 m/s
v = speed of the ball as it reach the ground
Using conservation of energy
initial kinetic energy + initial potential energy at the cliff = final kinetic energy just before reaching the ground
(0.5) m v₀² + mgh = (0.5) m v²
(0.5) v₀² + gh = (0.5) v²
(0.5) (10.3)² + (9.8 x 8.25) = (0.5) v²
v = 16.4 m/s
b)
As the launch angle is changed, the speed of the ball just before reaching the ground remain the same as the final speed does not depend on the angle of launch.
v = 16.4 m/s
c)
As the mass is changed, the speed of the ball just before reaching the ground remain the same as the final speed does not depend on the mass of the ball.
v = 16.4 m/s
Mountains and volcanoes are built at convergent plates in a boundary which pushes up the earth.
Lakes and rivers can be formed landforms from water
d
Explanation:
because they made contact that means their new force will be the same
