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3 years ago

Name the apparatus used to measure friction force? PLEASE HELP AS SOON AS POSSIBLE

1 answer:

8 0

There is no apparatus for it. It is either use something like ruler and table and rub together or rub our hands, and friction force will be showed.

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Freya has a mass of 14kg she is running at 1.1m/s to the left when she runs into Eric, who is standing still. Eric has a mass of

Lilit [14]

Their final velocity is 0.48 m/s.

We can use conservation of momentum to calculate the magnitude of the final velocity.

Momentum before collision is equal to the momentum after collision

m1v1+m2v2=(m1+m2)v

here, v is final velocity , assuming right side velocity as positive, and left side velocity as negative.

14*(-1.1)+18*(0)=(14+18)v

v=-0.48 m/s

Here, negative sign indicates that they both will move in left direction.

8 0

4 years ago

10. Calculate the kinetic energy of a running back that has a mass of 80 kg and

EastWind [94]

Answer:

The answer is

Explanation:

The kinetic energy of an object given it's mass and velocity can be found by using the formula

$KE = \frac{1}{2} m {v}^{2}$

where

m is the mass

v is the velocity

From the question

m = 80 kg

v = 8 m/s

The kinetic energy is

$KE = \frac{1}{2} \times 80 \times {8}^{2} \\ = 40 \times 64$

We have the final answer as

Hope this helps you

5 0

3 years ago

7) The acceleration of gravity on the Moon is only one-sixth of that on Earth. If you hit a baseball on the Moon with the same e

rusak2 [61]

Answer:

The acceleration of gravity on the Moon is only one-sixth of that on Earth. If we hit a baseball on the moon with the same effort(and at the speed and angle)that we would on earth, the ball would land 6 times as far. The ball on the moon will cover 6 times more distance than Earth.

Explanation:

Speed=distance travelled/Time required speed

Speed=d/t

Acceleration of gravity on earth=9.8 m/s^2

Acceleration of gravity on Moon=1.62 m/s^2

So the maximum height of ball will be the ration of these both gravity.

4 0

3 years ago

According to Boyles’ law, PV = constant. If a graph is plotted with the pressure P against the volume V, the graph would be a(n)

Hunter-Best [27]

Answer:

C. hyperbola

Explanation:

From Boyle's law:

PV = k, where k is a constant

Solving for P:

P = k / V

At first glance, this equation doesn't fit any of the options. But when you graph it, you can see that it's actually a <em>rotated</em> hyperbola.

4 0

3 years ago

Read 2 more answers

Projectiles that strike objects are good examples of inelastic collisions. A 0.1 kg nail driven by a gas powered nail driver col

Ratling [72]

In an inelastic collision, only momentum is conserved, while energy is not conserved.

1) Velocity of the nail and the block after the collision
This can be found by using the total momentum after the collisions:
$p_f=(m+M)v_f=4.8 kg m/s$
where
m=0.1 kg is the mass of the nail
M=10 kg is the mass of the block of wood
Rearranging the formula, we find $v_f$ , the velocity of the nail and the block after the collision:
$v_f= \frac{p_f}{m+M}= \frac{4.8 kg m/s}{0.1 kg+10 kg}= 0.48 m/s$

2) The velocity of the nail before the collision can be found by using the conservation of momentum. In fact, the total momentum before the collision is given only by the nail (since the block is at rest), and it must be equal to the total momentum after the collision:
$p_i = mv_i = p_f$
Rearranging the formula, we can find $v_i$ , the velocity of the nail before the collision:
$v_i = \frac{p_f}{m}= \frac{4.8 kg m/s}{0.1 kg}=48 m/s$

6 0

3 years ago

Read 2 more answers