Answer:
W_net = 57.57J
Explanation:
We are given;
Mass of canister; m = 2kg
Initial velocity of the canister; v_i = 2.2 m/s
Final velocity of the canister; v_f = 7.9 m/s
From work energy theorem, the net work done is equal to the change in kinetic energy. Thus;
W_net = ΔKE
W_net = KE_f - KE_i
W_net = (1/2)mv_f² - (1/2)mv_i²
W_net = (1/2)m(v_f² - v_f²)
Plugging in the relevant values to give;
W_net = (1/2)(2)(7.9² - 2.2²)
W_net = 57.57J
Question 9 is 100 N.
Question 10 is No, the bike's motion is not changing so it could be at rest or moving at a constant velocity.
Question 11 is Be doubled.
Question 12 is Ella is correct.
Hope i helped.
Answer:0.507m
To answer this question, you need to know how to calculate a cube volume. Cube volume is calculated by multiplying the length^3, make its unit become cubic meter.
In this case we know the volume is 130L and asked how long is the length in meter. Then you need to convert the liter into m3. The calculation would be:
V=R^3
130L= R^3
R= 3<span>√(130m3/1000)
R= 5.065797/10 m
R= 0.506579m
Rounded up to 0.507m</span>
A! Good luck on your test!