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3 years ago

Which quantity is represented by the area under a force-time graph?

Physics

1 answer:

Yanka [14]3 years ago

3 0

Answer:

C momentum change

Explanation:

An impulse results in a change of momentum.

An impulse is a force action over a period of time.

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A race car starts at rest and speeds up to 40 m/s in a distance of 100 m. Determine the acceleration of the car.

Finger [1]

Answer:

Acceleration of the car, $a=8\ m/s^2$

Explanation:

Given that,

Initial speed of the car, u = 0 (at rest)

Final speed of the car, v = 40 m/s

Distance covered, s = 100 m

We need to find the acceleration of the car. It can be calculated using third equation of motion as :

$v^2-u^2=2as$

a is the acceleration of the car

$a=\dfrac{v^2}{2s}$

$a=\dfrac{(40)^2}{2\times 100}$

$a=8\ m/s^2$

So, the acceleration of the car is $8\ m/s^2$ . Hence, this is the required solution

8 0

3 years ago

A rectangular block floats in pure water with 0.400 in. above the surface and 1.60 in. below the surface. When placed in an aque

labwork [276]

Answer:

specific gravity = 0.8

specific gravity of solution = 2

Explanation:

given data

rectangular block above water = 0.400 in

rectangular block below water = 1.60 in

material floats below water = 0.800 in

solution

first we get here specific gravity of block that is

specific gravity = block vol below ÷ total block vol × specific gravity water ..............1

put here value we get

specific gravity = $\frac{1.60}{1.60+0.400}$ × 1

specific gravity = 0.8

and now we get here specific gravity of solution that is express as

specific gravity of solution = total block vol ÷ block vol below × specific gravity block ........................2

put here value we get

specific gravity of solution = $\frac{1.60+0.400}{0.800}$ × 0.8

specific gravity of solution = 2

6 0

3 years ago

As beverages are produced what action will increase the solubility of co2 in them most?

Alla [95]

Answer: D. decreasing the temperature

Explanation:

8 0

3 years ago

Read 2 more answers

Define what is energy and work

Mashutka [201]

The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force.

8 0

3 years ago

If i have a kinematic equation vf^2=vi^2-2*a(xf-xi), how can i solve for xi step by step

azamat

Answer:

Explanation:

$v_f^2 = v_i^2-2a(x_f-x_i)$