Ask question

Ask question

All categories

vladimir1956 [14]

3 years ago

11

A push on a 1-kg brick accelerates it. Neglecting friction, equally accelerating a 10-kg brick requires 10 times as much force.

Using your knowledge of Newton’s Second Law, explain why this is correct.

1 answer:

sergij07 [2.7K]3 years ago

6 0

It is CVM this is simple

You might be interested in

You throw a ball straight up. The ball has an initial speed of 11.2 m/s when it leaves your hand What is the maximum height the

Jet001 [13]

Answer:

Explanation:

Given

initial velocity $u=11.2\ m/s$

At maximum height velocity of ball is zero

using

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

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

$(0)^2 -(11.2)^2=2\times (-9.8)\times (s)$

$s=\frac{11.2^2}{2\times 9.8}$

$s=6.4$

time taken by the ball to reach the maximum height

$v=u+at$

$0=11.2-9.8\times t$

$t=\frac{11.2}{9.8}$

$t=1.142\ s$

At $t=2\ s$ height of ball is

$h=ut+\\frac{1}{2}at^2$

$h=11.2\times 2-\frac{1}{2}9.8\times (2)^2$

$h=22.4-19.6$

$h=2.8\ m$

i.e. ball is moving downward

height at $v=5\ m/s$

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

$s=\frac{25-125.4}{2\times (-9.8)}$

$s=5.12\ m$

8 0

3 years ago

Calculate the distance moved by a runner who runs with a speed of 5 km/h for a period of 1.5 hours.

FrozenT [24]

Answer:

7.5 km

Explanation:

h5 per hour means that he traveled 5 km in 1 our. And then half of the hour, which means half an hour 5 km which is 2.5.

5 + 2.5 = 7.5

or just 1.5 x 5 = 7.5

8 0

3 years ago

What type of star is the sun?

finlep [7]

I believe the correct answer from the choices listed above is option B. The sun is a main sequence type of star. <span>The sun is classified as a G2V star, sometimes referred to as a yellow dwarf. It is a Population I star in its main </span>sequence<span>. Hope this answers the question.</span>

5 0

4 years ago

Read 2 more answers

a block of wood loses 160 j of gravitational potential energy as it slides down a ramp. if it has 90 J of kinetic energy at the

Nataly_w [17]

It would go slower there needs to be more gravity to go faster

3 0

4 years ago

Read 2 more answers

A balloon rubbed against denim gains a charge of −7.0 µc. what is the electric force between the balloon and the denim when the

zubka84 [21]

The solution for this problem is computed by through this formula, F = kQq / d²Plugging in the given values above, we can now compute for the answer.
F = 8.98755e9N·m²/C² * -(7e-6C)² / (0.03m)² = -489N, the negative sign denotes attraction.

4 0

3 years ago