The car's rate of acceleration : a = 2.04 m/s²
<h3>Further explanation</h3>
Given
speed = 110 km/hr
time = 15 s
Required
The acceleration
Solution
110 km/hr⇒30.56 m/s
Acceleration is the change in velocity over time
a = Δv : Δt
Input the value :
a = 30.56 m/s : 15 s
a = 2.04 m/s²
True is the correct answer hope this helps
Answer: 20 m/s in 2 significant figures.
Explanation:
Initial velocity (u) = 0 m/s
Acceleration by gravity (a) = 9.81 m/s^2
Displacement (s) = 20m
Final velocity (v) = ?
Now, use formula
v^2 = u^2 + 2 * a * s
or, v^2 = 0^2 + 2 * 9.81 * 20
or, v = square root of( 2 * 9.81 * 20 )
So, v = 20 m/s in 2 significant figures.
Answer:
Explanation:
Ignoring friction and assuming one ramp end rests on level ground.
gravity acceleration acting parallel to the ramp is gsinθ.
F = mgsinθ
mg = 250 N, sinθ = 3/25
F = 250(3/25)
F = 30 N
A 25 meter long ramp strong enough to hold a person plus a 250 N refrigerator would weigh much more than 250 N.
The answer is A. Cones, as rods are not sensitive to color. :)