All categories

3 years ago

Hi:) what does the one highlighted in pink mean?

Physics

1 answer:

Law Incorporation [45]3 years ago

5 0

Answer:

The acceleration of the car at the instant when t=3s is found by taking the gradient of the tangent at the point t=3.

The tangent are those dotted lines sloping upwards in the graph.

Tangent: A straight line that touches the curve and does not intersect it.

The reason why they wrote instantaneous is because the acceleration (or gradient of graph) is not constant throughout hence it is just at the moment when t=3s.

Gradient is used to find the acceleration of a speed time graph.

You might be interested in

When the position of the mass is farthest from the equilibrium position, what is the velocity of the mass?

Llana [10]

At the most distant point, the size of the speed is zero (0 m/s). This is a direct result of preservation of vitality. PE = KE. The most distant far from the harmony position is the maximum PE. Hence it can have no KE. No KE implies no speed since KE = .5mv2

5 0

3 years ago

A deviant person would behave in a culturally unacceptable

aivan3 [116]

Answer:

True

Explanation:

This is because to know how someone behaves, they have to perform a particular action.

4 0

3 years ago

Does the depth of a pot affect how water freezes

Iteru [2.4K]

In my opinion it does. The more water the pot holds, the longer you need to wait for it to freeze. Since there is more water, some parts may not be completely frozen. An experiment you can try is to get an ice cube container and a pot. fill both of them and put them in the freezer for the same amount of time. When you take it out, the ice cubes should be frozen leaving the pot with cold water.

3 0

3 years ago

Read 2 more answers

The mass of the particles that a river can transport is proportional to the sixth power of the speed of the river. A certain riv

kow [346]

Answer:

1.122 m/s

Explanation:

So usually a river with a speed of 1 meters per second can transport particle that weighs:

$1^6 = 1 kg$

If the particle is twice as massive as usual, then its weights would be 1 * 2 = 2kg

This means the river must be flowing at a speed of

$2^{\frac{1}{6}} = 1.122 m/s$

5 0

3 years ago

If it takes 50.0 seconds to lift 10.0 Newtons of books to a height of 7.0

Ilya [14]

Work of the force = 10 N

Time required for the work = 50 sec

Height = 7 m

We are given with the value of work and time in the question.

Substitute the values in the formula of power and then you'll get the power required.

We know that,

w = Work

p = Power

t = Time

By the formula,

Given that,
Work (w) = 7 m = 70 Joules
Time (t) = 50 sec
Substituting their values,

p = 70/50

p = 1.4 watts

Therefore, the power required is 1.4 watts.

Hope it helps!

3 0

3 years ago