Answer:
29.69 m/s
Explanation:
From the question given above, the following data were obtained:
Height (h) = 45 m
Velocity (v) =...?
Next, we shall determine the time taken for the ball to get to the ground. This can be obtained as follow:
Height (h) = 45 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
45 = ½ × 9.8 × t²
45 = 4.9 × t²
Divide both side by 4.9
t² = 45/4.9
Take the square root of both side
t = √(45/4.9)
t = 3.03 s
Finally, we shall determine the velocity with which the ball hits the ground. This is illustrated below:
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) = 3.03 s
Final velocity (v) =.?
v = u + gt
v = 0 + (9.8 × 3.03)
v = 0 + 29.694
v = 29.694 ≈ 29.69 m/s
Therefore, the ball hits the ground with a velocity of 29.69 m/s.
Answer: B
Explanation:
Because the ramp is too high, the forces aren't enough to push onto the car stuck down.
Answer:fluid friction
Explanation:
Creates less friction due to the liquids.
Answer:
0.43 s
Explanation:
speed (s) = 95 mi/h = 95 x 1600/3600 = 42.5 m/s (converting to m/s)
distance (d) = 60 ft 6 inches = (60 x 0.3048) + (6 x 0.025) = 18.44 m (converting to meters)
speed = distance / time
time = distance / speed = 18.44 / 42.5 = 0.43 s
1. The motion of a body
2. Measured by mass and velocity
3. P=mv
4. Kilogram meters per second
5. Sorry I don’t know the answer for this one