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3 years ago

Calculate the mechanical advantage if a machine allows you to move a 60 newton rock by only exerting 15 newtons of force.

Physics

2 answers:

murzikaleks [220]3 years ago

6 0

Answer:

4 Newtons

Explanation:

I think it's 4 because mechanical advantage = output force/input force
So, it would be 60/15, which is 4 newtons

allochka39001 [22]3 years ago

5 0

Answer:

Explanation:

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A golf ball (mass 0.045 kg) is hit with a club from a tee. The plot shows the force on the ball as a function of time in millise

almond37 [142]

Answer:

16.3 m/s

Explanation:

We are given that

Mass of golf ball=m=0.045 kg

We have to find the speed right after the hit.

$b_1=(16-1)\times 10^{-3}=15\times 10^{-3} s$

$b_2=(12-6)\times 10^{-3}=6\times 10^{-3} s$

Force,F=70 N

Change in momentum=Area of trapezium

Area of trapezium,A= $\frac{1}{2}(b_1+b_2) h$

Using the formula

$m(v-u)=\frac{1}{2}(15+6)\times 10^{-3}\times 70$

$0.045(v-u)=\frac{1}{2}(21)\times 10^{-3}\times 70$

$v-u=\frac{1}{2}\times \frac{1}{0.045}\times 21\times 10^{-3}\times 70$

$v-u=16.3$

Initial velocity of golf ball=u=0

$v-0=16.3$

$v=16.3 m/s$

5 0

3 years ago

The velocity of a car changes from 50 m/s north to 40 m/s north in 2 seconds. What is the car’s acceleration?

Zigmanuir [339]

Acceleration is defined as the change in velocity divided by the change in time. Since the velocity changed from 50 m/s to 40 m/s (-10 m/s change) in 2 seconds, then the acceleration is (-10/2) = -5 m/s^2 northward. Hope this helps!

4 0

4 years ago

Which of the following tools should a scientist use to measure an object in milligrams? a.Electronic balance b.Pan balance .c.Ta

QveST [7]

Answer:

c. Tape measure.

Explanation:

Here in this case we have to measure the length of the object ( distance) so we need to use tape measure.

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3 years ago

Read 2 more answers

First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is giv

AlladinOne [14]

Answer: It takes 2.85 seconds.

Explanation: according to the question, the kinematics equation for vertical motion is

$y(t) = y_{0} + v_{0} .t - \frac{1}{2} .gt^{2}$