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2 years ago

I don’t know this one I need help

Physics

1 answer:

nikdorinn [45]2 years ago

4 0

D
Using the kinetic energy 1/2mv^2 formula
5*10^5 is the answer

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The only force acting on a 3.2 kg canister that is moving in an xy plane has a magnitude of 6.7 N. The canister initially has a

Fynjy0 [20]

Answer:

The work done by the force is 5.76 J

Explanation:

Given;

mass of canister , m = 3.2 kg

magnitude of force, f = 6.7 N

initial velocity of the canister on x-axis, $v_i$ = 3.3i m/s

final velocity of the canister on y- axis, $v_f$ = 6.9j m/s

The work done on the canister = change in the kinetic energy of the canister

$W = K.E_f - K.E_i$

where;

K.Ei is the initial kinetic energy

K.Ef is the final kinetic energy

The initial kinetic energy:

$K.E_i = \frac{1}{2} *m\sqrt{i^2 +j^2+z^2}\\\\K.E_i = \frac{1}{2} *3.2\sqrt{3.3^2 +0^2+0^2}\\\\K.E_i = 5.28 \ J$

The final kinetic energy:

$K.E_f = \frac{1}{2} *m\sqrt{i^2 +j^2+z^2}\\\\K.E_f = \frac{1}{2} *3.2\sqrt{0^2 +6.9^2+0^2}\\\\K.E_f = 11.04 \ J\\$

W = 11.04 - 5.28

W = 5.76 J

Therefore, work done on the canister by the 6.7 N force during this time is 5.76 J

3 0

4 years ago

A woman weighs 580 N. What is her mass?

mote1985 [20]

w = mg where g = 9.8 N/kg

m = 580/9.8 = 59 kg

5 0

4 years ago

Read 2 more answers

Choose the statement that is a misconception about a system in chemical equilibrium. (2 points) The rate of the forward reaction

almond37 [142]

Answer:

The correct answer is "The reactions stop once equilibrum is achieved"

Explanation:

A system is said to have attained equilibrium when the rate of forward reaction is the same/equal to the rate of backward reaction. The reaction below shows a chemical reaction that is at equilibrium

2N₂O₅ (aq) ⇄ 4NO₂ (aq) + O₂ (aq)

An equilibrium reaction is always a reversible reaction. <u>When the system is at equilibrium (when there is a balance), the concentration of the reactants and products do not change despite the fact that reaction does not stop</u>; what happens however is that the rate at which the reactant(s) are formed (backward reaction) will be equal to the rate at which the product(s) are formed (forward reaction).

From the explanation above, it can be deduced that "The reactions stop once equilibrum is achieved" is a misconception about a system in chemical equilibrium.

8 0

3 years ago

Elements in compounds are held together by chemical what

oksano4ka [1.4K]

Bonds hold all compounds together

6 0

3 years ago

What is wrong with the following statement: When you exert a force on a baseball, the equal and opposite force on the ball balan

gregori [183]

Answer:

When you exert a force on a baseball, there exists an equal and opposite force on the ball therefore, the ball will accelerate in opposite direction.

Explanation:

When you hit a ball with baseball bat, the bat exerts a great force on the ball which causes the ball to accelerate in the opposite direction. It is to be noted that the mass of bat is much greater than mass of ball but the acceleration of ball is also greater than the acceleration of the bat so both bat and ball almost exert same magnitude of force but in opposite direction and as a result both bat and ball accelerate in opposite direction, the deciding factor is of course the relative force applied by the batter and the bowler.

6 0

3 years ago