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svetoff [14.1K]
3 years ago
7

Using science terms like force, mass, energy, and inertia, describe how you could get an object to fly a further distance in a c

atapult?
Physics
1 answer:
qaws [65]3 years ago
5 0

i need the same question

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What is one way to lower gravitational potential energy?
il63 [147K]

Answer:

decrease the height

Explanation:

height is directly proportional to the g.p.e

4 0
2 years ago
A cheetah is resting when a hare traveling in a straight path passes at it's top speed of 25m/s. It takes the cheetah 1.5 second
timofeeve [1]

Answer:

a) 2.3 m/s^2

b) 33.3 s

c) 803 m

d) 0 m/s

Explanation:

We need to apply the accelerated motion formulas.

The acceleration is given by:

a=\frac{v_f-v_o}{t}\\\\a=\frac{45m/s-0m/s}{20s}\\\\a=2.3m/s^2

we need to calculate the time the cheetah takes to stop when it starts to decelerate:

v=vo+a*t\\\\t=\frac{v-v_o}{a}\\\\t=\frac{0-45m/s}{-4m/s^2}=11.3s\\\\t_t=20s+2s+11.3s=33.3s

We need to calculate the displacement for all of the stages:

stage 1:

x_1=\frac{1}{2}*a*t^2\\\\x_1=\frac{1}{2}*2.3m/s^2*(20)^2\\\\x_1=460m

stage 2:

x_2=v*t\\x_2=45m/s*2s=90m

stage 3:

x_3=v_o*t+\frac{1}{2}*a*t^2\\\\x_3=45m/s*(11.3s)-\frac{1}{2}*4m/s^2*(11.3)^2\\\\x_3=253m

The total displacement is given by:

d=x_1+x_2+x_3\\d=460m+90m+253m=803m

the final velocity of the cheetah is zero because the cheetah decelerates until stop.

4 0
4 years ago
How can a better understanding of friction help predict geological events, like earthquakes?
ANTONII [103]

Answer:

Friction plays a key role in how ruptures unzip faults in the earth's crust," says Vito Rubino, research scientist at Caltech's Division of Engineering and Applied Science (EAS). "Assumptions about dynamic friction affect a wide range of earthquake science predictions, including how fast ruptures will occur, the nature of ground shaking, and residual stress levels on faults. Yet the precise nature of dynamic friction remains one of the biggest unknowns in earthquake science."

hope it helps

6 0
3 years ago
A person is standing on a scale placed on the floor of an elevator. At time t, the elevator is at rest and the reading on the sc
larisa [96]

Answer:

A- The elevator is moving upward at constant speed

Explanation:

am not sure of my answer but I think this is the most logical answer

8 0
3 years ago
When a p-n-p transistor is operated in saturation region, then its ___________<br><br>​
Likurg_2 [28]

Answer:

Base-emitter and Base-collector junctions are forward biased

8 0
3 years ago
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