Acceleration = velocity / time.
Power = energy / time
Multiply each side by 'time', then
divide each side by 'power':
Time = energy / power
Time = 432 / 75 = <em>5.76 seconds</em>
Answer:
because of carbon content in wood harms environment , although forest can be replenished but no one wanted to plant a tree in his/ her home. And also, cutting of woods causes environmental imbalances. Further, burning of wood causes a lot of pollution. Hence, it is advisable not to use wood as a fuel.
Explanation:
Answer:
The amount of effort needed to move the box is 187.5 N
Explanation:
weight of the box = load moved by the ramp, L = 750 N
mechanical advantage of the ramp, MA = 4
effort needed to move the box, E = ?
Mechanical advantage is given as = Load / Effort
Effort = Load / Mechanical advantage
Effort = 750 / 4
Effort = 187.5 N
Therefore, the amount of effort needed to move the box on to the truck using a ramp is 187.5 N
Answer:
The speed traveled by the car is 40 meter per second.
Explanation:
The formula for the relation between the power and the force is as follows:
P = Fv
Where F is the force and v is the speed.
As given
To travel at constant speed, a car engine provides 24KW of useful power. The driving force on the car is 600N.
F = 600 N
Convert power from KW to W.
1 KW = 1000 W
24 KW = 24 × 1000 W
= 24000 W
Thus
P = 24000 W
Put these values in the formula.
24000 = 600 × v
24000 = 600v
v = 40 meter per second .
Therefore the speed of the car is 40 meter per second .