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Svet_ta [14]
3 years ago
8

If you have to apply 40 N of force to a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the

crowbar?
Physics
2 answers:
Sauron [17]3 years ago
6 0
The AMA is calculated as:
AMA = force obtained / force applied
AMA = 400 / 40
AMA = 10
vlada-n [284]3 years ago
5 0

Answer: 10 is the actual mechanical advantage of the crowbar.

Explanation:

Force exerted on the crowbar,Input forceF_I = = 40 N

Force exerted by the crowbar,Output force F_O  = 400 N

Actual Mechanical Advantage :

\frac{F_O}{F_I}=\frac{400 N}{40 N}=10

10 is the actual mechanical advantage of the crowbar.

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rodikova [14]

Answer:

16 m/s.

Explanation:

The following data were obtained from the question:

Mass of truck = 5000 Kg

Velocity of truck = 8 m/s

Mass of car = 2500 kg

Velocity of car =..?

Next, we shall determine the momentum of the truck. This can be obtained as follow:

Mass of truck = 5000 Kg

Velocity of truck = 8 m/s

Momentum of truck =.?

Momentum = mass × velocity

Momentum = 5000 × 8

Momentum of the truck = 40000 Kg.m/s

Finally, we shall determine the velocity of the car as follow:

From the question given above, we were told that the car and truck has the same momentum.

This implies that:

Momentum of the truck = momentum of car = 40000 Kg.m/s

Thus, the velocity of the car can be obtained as shown below:

Mass of car = 2500 kg

Momentum of the car = 40000 Kg.m/s

Velocity of car =..?

Momentum = mass × velocity

40000 = 2500 × velocity

Divide both side by 2500

Velocity = 40000/2500

Velocity = 16 m/s

Therefore, the velocity of the car is 16 m/s.

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Explanation:

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D. <u>21 ml</u>

5 0
3 years ago
Read 2 more answers
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