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Arlecino [84]
3 years ago
13

A student performed an experiment with a metal sphere. The student shot the sphere from a slingshot and measured its maximum hei

ght. Six different trials were performed with the sphere being shot at a different angle from the horizontal for each trial. What is the independent variable
Physics
1 answer:
cestrela7 [59]3 years ago
5 0

The correct answer is Launch angle

Explanation:

The Independent Variable can be easily identified because this is the factor or variable the researcher modifies. In this case, this term applies to the angle because as part of the experiment the student changes the angle multiple times to test how the maximum height changes. Moreover, the maximum height would be the dependent variable as it is the main factor and it changes or depends on other variables including the angle. Thus, it can be concluded the independent variable is the launch angle or the angle from which the ball is launched.

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A raindrop of mass 2.52 × 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model th
goldfiish [28.3K]

Answer:

0.0247212 Joules

-0.0247212 Joules

Explanation:

Potential energy

PE=mgh\\\Rightarrow PE=2.52\times 10^{-5}\times 9.81\times 100\\\Rightarrow PE=0.0247212\ Joules

a) The work done by the gravitational force is given by the potential energy that the body has at the start of the fall.

Work done is considered as positive if the force which is being applied is in the direction of motion.

Hence, the work done on the raindrop by the gravitational force is 0.0247212 Joules

b) As the drop is falling the air resistance provides an opposite force this means the sign of the work done will be negative.

So, the work done on the raindrop by air resistance is -0.0247212 Joules

5 0
3 years ago
A basketball referee tosses the ball straight up for the starting tip-off. At what velocity (in m/s) must a basket ball player l
mamaluj [8]

Answer:4.93 m/s

Explanation:

Given

height to reach is (h )1.24 m

here Let initial velocity is u

using equation of motion

v^2-u^2=2ah

here Final Velocity v=0

a=acceleration due to gravity

0-u^2=2\left ( -g\right )h

u=\sqrt{2gh}

u=\sqrt{2\times 9.81\times 1.24}

u=\sqrt{24.328}

u=4.93 m/s

7 0
4 years ago
A block of mass 57.1 kg rests on a slope having an angle of elevation of 28.3°. If pushing downhill on the block with a force ju
stira [4]

Answer:

The coefficient is 0.90

Explanation:

Drawing a diagram makes thing easier, we will assume that the acceleration tends to zero because it start barely moving.

-F_s+mg*sin(\theta)+F=0\\F_s=57.1kg*9.8m/s^2*sin(28.3)+177N\\F_s=442N\\F_s=\µ*N\\N=m*g*cos(\theta)\\N=57.1*9.8*cos(28.3)=493N\\\\\µ=\frac{442N}{493N}=0.90

3 0
3 years ago
If you sprain an ankle your most likely to injure a *
juin [17]
You most likely injure a ligament
3 0
3 years ago
7. A 1000-kg car comes to a stop without skidding. The car's brakes do 50,000 J of work
sashaice [31]

Answer:

10 m/s

Explanation:

5 0
3 years ago
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