Answer:
Basically, scientists use hypothesis as a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation:
Answer: Speed
Explanation:
The speed of a body is the rate of distance (in metres) that it travels in one second. Hence, speed unlike velocity, is total distance travelled by the body without regard to direction divided by the total time taken.
i.e Speed = Distance / time taken
Thus, the standard international (SI) unit of speed is metres per second (m/s)
I suppose they can interpret the data differently.
I hope this helps!
We know, a = (v₂-v₁) / (t₂-t₁)
Here, v₂-v₁ = 19 m/s
t₂-t₁ = 2 s
Substitute it into expression,
a = 19/2
a = 9.5 m/s²
So, your final answer is 9.5 m/s²
Hope this helps!
Answer:
a) Δp = -2.0 kgm / s, b) Δp = -4 kg m / s
Explanation:
In this exercise the change in moment of a ball is asked in two different cases
a) clay ball, in this case the ball sticks to the door and we have an inelastic collision where the final velocity of the ball is zero
Δp = p_f - p₀
Δp = 0 - m v₀
Δp = - 0.100 20
Δp = -2.0 kgm / s
b) in this case we have a bouncing ball, this is an elastic collision, as the gate is fixed it can be considered an object of infinite mass, therefore the final speed of the ball has the same modulus of the initial velocity, but address would count
v_f = - v₀
Δp = p_f -p₀
Δp = m v_f - m v₀
Δp = m (v_f -v₀)
Δp = 0.100 (-20 - 20)
Δp = -4 kg m / s
