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3 years ago

Mary is 52kgs and standing on a ladder. What forces are acting on her?

Physics

1 answer:

Rus_ich [418]3 years ago

8 0

Answer:

3 forces are acting on her: Friction, Gravity and Muscular force.

Explanation:

Due to gravity and friction she is remaining on the ladder without flying and by not slipping.

Because of muscular force she is being able to interact with ladder and stand on it. Otherwise she will fell down.

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What are the three ways to lessen any risk?

dimulka [17.4K]

Answer:

Don't be there, notice patterns, ask for help.

Explanation:

4 0

2 years ago

Read 2 more answers

A car has a mass of 1500 kg. If the force acting on the car is 6750 N to the east, what is the car’s acceleration?

Paha777 [63]

The car's acceleration is equal to $4.5\frac{m}{s^{2}}$ to the east.

Why?

To calculate the car's acceleration, we need to use the given information about its mass and the force applied on it. We can use the following formula:

$Force=mass*acceleration\\\\6570N=1500Kg*acceleration\\\\acceleration=\frac{6750N}{1500Kg}=4.5\frac{m}{s^{2}}$

Hence, we have that the car's acceleration is equal to $4.5\frac{m}{s^{2}}$ to the east.

Have a nice day!

8 0

3 years ago

Momentum is mass times velocity, so another way to think of momentum is ____ in motion.

Vinil7 [7]

Answer: inertia

i don't know just want points .-.

sorry

5 0

3 years ago

A magnetic field of 0.080 T is in the y-direction. The velocity of wire segment S has a magnitude of 78 m/s and components of 18

Annette [7]

Answer:

Part a)

Induced EMF when length vector is along Z direction is 0.72 V

Part b)

Induced EMF when length vector is along Y direction is ZERO

Explanation:

As we know that the motional EMF induced in the wire is given as

$E = (v\times B). L$

As we know that

$v = 18\hat i + 24\hat j + 72\hat k$

$B = 0.080 \hat j$

$L = 0.50 \hat k$

now we have

$\vec v \times \vec B = 1.44\hat k - 5.76 \hat i$

so we have

$E = 1.44 (0.50) = 0.72 V$

If the length vector is along Y direction then we have

$L = 0.50 \hat j$

so again we have

$\vec v \times \vec B = 1.44\hat k - 5.76 \hat i$

so we have

EMF = 0

6 0

3 years ago

A(n) 0.155 kg baseball is thrown with a speed of 18.4 m/s. It is hit straight back at the pitcher with a final speed of 18.4 m/s

Ivan

Answer:

5.704kg.m/s toward the pitcher

Explanation:

Impulse (Ft)= change in momentum

Impulse= m(v-u)

m=0.155 kg , v=18.4 m/s , u=18.4m/s

impulse=0.155[-(18.4) - (18.4)]

= 0.155(-36.8)

= -5.704 kg.m/s

the negative means towards the pitcher

6 0

3 years ago