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zepelin [54]
4 years ago
11

Jasper and Gemma are going to play on a teeter totter. Gemma gets on first. When Jasper gets on, Gemma moves into the air, but s

he does not move to the top. Which statement could correctly explain the forces acting on the teeter totter? The forces are balanced because Jasper weighs the same as Gemma. The forces are unbalanced because Jasper weighs the same as Gemma. The forces are balanced because Jasper weighs more than Gemma. The forces are unbalanced because Jasper weighs more than Gemma.
Physics
2 answers:
alexdok [17]4 years ago
4 0
The answer is A- The forces are balanced because Jasper weights the same as gemma.
slavikrds [6]4 years ago
3 0
The forces are unbalanced because Jasper weighs more than Gemma

The side that Gemma is on will only move upwards if the force exerted on the other side is greater than the force exerted by Gemma. In this case, force is referring to the weight of the children. Therefore, in order for Gemma to go upwards, Jasper must weigh more than her.
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91.44 meters or 300 feet

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A basketball is shot at 14.0 m/s at a 65.0 degree angle. What is the magnitude only (no direction) of the velocity of the ball 2
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3 years ago
Amy is in-line skating. Her mass is 50 kg. She is rolling forward (north) on a flat section of road at 10 m/s. The rolling frict
Licemer1 [7]

Answer:

The right solution is "0.50 m/s²". A further explanation is provided below.

Explanation:

The given values are:

Mass,

m = 50 kg

Speed,

v = 10 m/s

Rolling friction acting backward (south),

f = 10 N

Air resistance acting backward (south),

F_T = 15 N

The total force acting will be:

⇒  F = -f-F

On substituting the given values, we get

⇒      =-10-15

⇒      =-25 \ N

Now,

⇒  a = \frac{F}{m}

On substituting the given values, we get

⇒     =\frac{-25}{50}

⇒     =-0.50 \ m/s^2

The horizontal acceleration will be "0.50 m/s²" because the (-)ve sign indicates it in south direction.

4 0
3 years ago
Penguin #1 travels at speed v=0.9 c relative to penguin #2. At the instant that both are at the origin, they synchronize their c
Alekssandra [29.7K]

Answer:

L = 0.44 [m]

Explanation:

Here we can use the Lorentz transformation related to length to solve it:

L=L_{0}\sqrt{1-\beta^{2}}

<u>Where</u>:

L₀ is the length of the moving reference frame (penguin #1)

L is the length of the fixed reference frame (penguin #2)

β is the ratio between v and c

<u>We know that v = 0.9c so we can find β.</u>

\beta = \frac{0.9c}{c}=0.9

L=1 [m]\sqrt {1-0.9^{2}} = 0.44 [m]

Therefore, the length of the meter stick of #1 observed by #2 is 0.44 m.

I hope it helps you!

6 0
4 years ago
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