All categories

3 years ago

Hello:)! I don’t really understand the uniform deceleration too :/

Physics

1 answer:

NARA [144]3 years ago

4 0

Answer:

Deceleration is the opposite of acceleration.

The mathematical formula for deceleration is:

$Deceleration = \frac{Final velocity - Initial velocity}{Time taken}$

Uniform deceleration of an object can be defined as decreasing the velocity of an object in equal amount in an equal interval of time.

The graph attached below shows a constant decrease in the velocity with a uniform time interval.

You might be interested in

Calculate earth's mass given the acceleration due to gravity at the north pole is 9.830 m/s2 and the mean radius of the earth at

valentinak56 [21]

Answer: $M = 5.98\times 10^{24} kg$

Explanation:

We know that force acting on an object due to Earth's gravity on the surface is given by:

$mg = G\frac{Mm}{r^2}\\ \Rightarrow g = \frac{GM}{r^2}$

where g is the acceleration due to gravity, r would be radius of Earth, M is the mass of Earth and G is the gravitational constant.

It is given that at pole, g = 9.830 m/s² and r = 6371 km = 6371 × 10³ m

$\Rightarrow M = \frac{g\times r^2}{G}$

$M = \frac{9.830 m/s^2 \times (6371 \times 10^3 m )^2}{6.67 \times 10^{-11} m^3 kg^{-1} s^{-2}}$

$\Rightarrow M = 5.98\times 10^{24} kg$

Hence, Earth's mass is $5.98\times 10^{24} kg$

5 0

3 years ago

Which of the following items involve a wedge?

elena55 [62]

Answer:

Explanation:

Maybe your question is meant to be: which is not a wedge, because wedge is a combination of two inclined planes, use to separate bodies which are held together by large forces. Option A,B & C are all wedge except D.

8 0

2 years ago

Read 2 more answers

You are pushing a wooden crate across the floor at constant speed. You decide to turn the crate on end, reducing by half the sur

borishaifa [10]

Answer:

D. Half as great

Explanation:

Since we know that the friction force between the surface of crate and ground is given as

$F_f = \mu F_n$

so here we know that

$\mu$ = friction coefficient between two surfaces which depends on the effective contact area between two surfaces

$F_n$ = normal force due to the object

So when we turn the object on another side such that the surface area is half then the friction coefficient will become also half

So here the friction force will also reduce to half

so correct answer will be

D. Half as great

3 0

2 years ago

The energy transported by a mechanical wave is indicated by which property of the wave?

Ksenya-84 [330]

Your answer would be Amplitude :)

5 0

3 years ago

Read 2 more answers

M=20kg F=10N d=25m<br>Work done=?

fomenos

w=f×d

w=10N×25m

w=250Nm

5 0

2 years ago