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Norma-Jean [14]
3 years ago
5

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:
Bond [772]3 years ago
8 0

Answer:

A. The forces are balanced because Jasper weighs the same as Gemma.

Explanation:

Took the test

vesna_86 [32]3 years ago
5 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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A lion has a mass of 45 kg. Answer the following questions about it, using correct units. a. The lion runs at a speed of 14.2 m/
Eva8 [605]
A) The kinetic energy of an object is given by:
K= \frac{1}{2}mv^2
where m is the mass of the object, and v its speed. For the lion in our problem, m=45 kg and v=14.2 m/s, so its kinetic energy is
K= \frac{1}{2}mv^2= \frac{1}{2}(45 kg)(14.2 m/s)^2=4537 J

b) the increase in gravitational potential energy of the lion is given by:
\Delta U = mg \Delta h
where g is the gravitational acceleration, and \Delta h is the increase in altitude of the lion. In this problem, \Delta h=28 m, so the increase in gravitational potential energy is
\Delta U=mg \Delta h=(45 kg)(9.81 m/s^2)(28 m)=12361 J

c) When the fox reaches the top of the tree, its gravitational potential energy is
U=mgh=(1.8 kg)(9.81 m/s^2)(3.8 m)=67 J
As it jumps, its kinetic energy is
K= \frac{1}{2}mv^2= \frac{1}{2}(1.8 kg)(8.1 m/s)^2=59 J
So the total mechanical energy of the fox as it jumps is
E=U+K=67 J + 59 J =126 J
6 0
3 years ago
if something is shot straight up in the air at a speed of 17 m/s, how much time before I it will hit the ground ​
wolverine [178]
About 17.2 square feet of inches
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2 years ago
A 55 newton force applied on an object moves the object 10 meters in the same direction as the force. What is the value of work
kifflom [539]

Answer: Option D: 5.5×10²Joules

Explanation:

Work done is the product of applied force and displacement of the object in the direction of force.

W = F.s = F s cosθ

It is given that the force applied is, F = 55 N

The displacement in the direction of force, s = 10 m

The angle between force and displacement, θ = 0°

Thus, work done on the object:

W = 55 N × 10 m × cos 0° = 550 J = 5.5 × 10² J

Hence, the correct option is D.

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Hello! ^^

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This technique allowed multiple peoples DNA to be compared to look for
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DNA sequencing is the technique which allows multiple peoples DNA to be compared to look for similarities and differences in order to solve crime and is denoted as option C.

<h3>What is DNA?</h3>

This is referred to as the deoxyribonucleic acid and contains the genetic components of organisms and is also located in the nucleus. On the other hand, DNA sequencing refers to the process of determining the nucleic acid sequence.

Each organisms has a unique DNA sequence which is why it is used to identify individuals through the use of bodily fluids such as saliva, blood etc.

It is used to compare the similarities and differences in order to solve crime thereby making it the most appropriate choice.

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