A 50.0-kg wolf is running at 10.0 m/sec. What is the wolfs kinetic energy?

1 answer:

7 0

Kinetic energy is the energy possessed by an object when in motion. It is calculated by one half the product of the mass and the square of the velocity of the system.

Kinetic Energy = mv^2 / 2 = 50 (10^2) / 2 = 2500 kg m^2/s^2 or 2500 J

Therefore, the correct answer is option E.

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A 35 kg boy is riding a 65 kg go-cart. He pushes on the gas pedal, causing the cart to accelerate at 5 m/s2. Use the equation F

trasher [3.6K]

Answer:

$\boxed {\boxed {\sf 500 \ Newtons }}$

Explanation:

The equation for force is given:

$F=m*a$

First, we must find the total mass, which is the sum of the boy's mass and the go-cart's mass.

total mass= boy's mass + go cart's mass

The boy's mass is 35 kilograms and the go cart's is 65 kilograms.

total mass= 35 kg+ 65 kg=100 kg

Now we know the total mass and the acceleration.

$m= 100 \ kg \\a= 5 \ m/s^2$

Substitute the values into the formula.

$F=100 \ kg * 5 \ m/s^2$

Multiply.

$F= 500 \ kg*m/s^2$

1 kilograms meter per square second is equal to 1 Newton.
Our answer of 500 kg*m/s² is equal to 500 Newtons.

$F= 500 \ N$

The force exerted by the go cart engine is <u>500 Newtons.</u>

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According to Newton´s second law of motion, what does an object with more mass require? Question 8 options:

Novay_Z [31]

More force to accelerate. If you push a car compared to a beach ball, which will you have to push harder for it to move? That's pretty much what the question is asking, if that helps any:)

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What is the velocity of a 50kg skater if her momentum is 225kg. m/s?

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|Momentum| = (mass) x (speed)

225 kg-m/s =(50kg) x (speed)

Divide each side by (50kg): Speed=(225 kg-m/s) / (50 kg) = 4.5 m/s .

Regarding the velocity, nothing can be said other than the speed, because
we have no information regarding the direction of the object's motion.

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Answer:

Speed:

$2.01x10^{8}m/s$