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3 years ago

14. Which of the following is an example of changing acceleration?

Physics

1 answer:

Anna71 [15]3 years ago

5 0

Answer : d

Method : Changing acceleration is when a moving object changes the direction or speed.

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A basketball player standing under the hoop launches the ball straight up with an initial velocity of v₀ = 3.25 m/s from 2.5 m a

matrenka [14]

Answer: 0.53m

Explanation:

According to the equation of motion v²= v₀²+2as

Since the body is launched upward, the final velocity at the maximum height will be "zero" since the body will momentarily be at rest at the maximum height i.e v = 0

Initial velocity given (v₀) = 3.25 m/s

The body is also under the influence of gravity but the acceleration due to gravity will be negative being an upward force (a = -g) and the distance (s) will serve as our maximum height (h)

The equation of motion will.now become

V = v₀² -2gh

Where v = 0 v₀ = 3.25m/s g = 10m/s h = ?

0 = 3.25² - 2(10)h

0 = 10.56 - 20h

-10.56 = -20h

h = 10.56/20

h = 0.53m

Therefore, the maximum height, h (in meters), above the launch point that the basketball will achieve is 0.53m

6 0

4 years ago

Discuss 4 way a scienicst can.reduce bias

Yanka [14]

Make sure to thank me

The answers are by:

Investigation
Sampling
Repetition
Blind Studies

7 0

4 years ago

Read 2 more answers

A car is accelerated at a constant rate from 15 m/s to 25 m/s. It takes the car 6 s to reach its final speed. What is the car’s

sladkih [1.3K]

Answer:

Explanation:

The car’s acceleration can be found by using the formula

$a = \frac{v - u}{t} \\$

where

v is the final velocity

u is the initial velocity

t is the time taken

a is the acceleration

From the question we have

$a = \frac{25 - 15}{6} = \frac{10}{6} = \frac{5}{3} \\ = 1.666666...$

We have the final answer as

Hope this helps you

5 0

3 years ago

Why are lighter cars allowed to drive on motorways at higher speeds than heavier ones?

daser333 [38]

Answer:

say a lighter car is going 80mph and a heavier car is going the same speed who do you think will have more damage i will say the heavier car

Explanation:

3 0

3 years ago

A punter wants to kick a football so that the football has a total flight time of 3.7 s and lands 56m away (measured along the g

Irina18 [472]

The maximum height is 16.8 m

Explanation:

In order to find the maximum height reached by the football, we can just analyze its vertical motion.

The vertical motion of the ball is a free fall motion, affected only by the force of gravity. So it is a uniformly accelerated motion, and we can use suvat equations.

First of all, we notice that the motion of the ball is symmetrical, so the time taken to reach the maximum height is equal to the time needed to fall down: Since the total time of flight is

T = 3.7 s

It means that the time to reach the maximum height is

$t=\frac{T}{2}=\frac{3.7}{2}=1.85 s$