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3 years ago

Muscles use force to move objects. When using a ramp to do work, would your muscles use more force or less force?

Physics

2 answers:

White raven [17]3 years ago

7 0

Less because the ramp is letting off force but i does depend on the way you are going on the ramp

Mademuasel [1]3 years ago

4 0

If it's up then more if it's down then less

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What is the net force on a race car with a mass of 1200 kg if its acceleration is 32.0m/s2 West?

frosja888 [35]

Answer:

38400N

Explanation:

F=mass×acceleration

=1200×32

=38400

3 0

3 years ago

What is it's speed at this time? A rocket blasts off and moves straight upward from the launch pad with constant acceleration. A

zhenek [66]

Answer: 31.85 m/s

Explanation:

Since we are talking about constant acceleration, we can use the following equation to find the speed $s$ of the rocket:

$s=\frac{d}{t}$

Where:

$d=86 m$ is the distance the rocket has traveled

$t=2.7 s$ is the time in which the rocket has traveled the distance $d$

Solving the equation with the given data:

$s=\frac{86 m}{2.7 s}$

$s=31.85 m/s$ This is the rocket's speed

6 0

3 years ago

1. Hydropower should be used rather than coal and mineral oil.

GalinKa [24]

True u dumb horse but anyways ima was the first time we had to a shower so we were going out to eat and I wanna join the group and then

7 0

3 years ago

Tony completed a 720 km journey with an average speed of 90 km/h for the first 285 km he travelled at an average speed of 95 Km/

sp2606 [1]

Answer:

$Speed = 87 km/h$

Explanation:

Given

Total Distance = 720km

Average Speed = 90km/h

Average Speed (285km) = 95km/h

Required

Determine the average speed for the rest of the journey

First we need to determine the time taken to complete the journey using

$Speed = \frac{Distance}{Time}$

$90 = \frac{720}{Time_1}$

Make Time the subject of formula

$Time_1 = \frac{720}{90}$

$Time_1 = 8 hour$

Next, we determine the time taken to complete 285km of the journey using

$Speed = \frac{Distance}{Time}$

$95 = \frac{285}{Time_2}$

Make Time the subject of formula

$Time_2 = \frac{285}{95}$

$Time_2 = 3 hours$

The difference between these calculated times is the time taken to complete the rest of the journey

$Time = Time_1 - Time_2$

$Time = 8\ hour - 3\ hour$

$Time = 5\ hour$

Also, we need to calculate the distance of the rest of the journey

$Distance = 720\ km - 285\ km$

$Distance = 435\ km$

The average speed can then be calculated;

$Speed = \frac{Distance}{Time}$

$Speed = \frac{435}{5}$

$Speed = 87 km/h$

<em>Hence, the average speed of the rest of the journey is 87km/h</em>

3 0

3 years ago

6. What is the resultant force on each car below? Remember TWO pieces of

tamaranim1 [39]

Explanation:

In first case, the forces on LHS and on RHS is the same i.e. 3 N. The force acting on the car is balanced force. As a result, the car will not move at all.

In second case,

Force on RHS = 2000 N

Force on LHS = -6000 N

Net force acting on it is given by :

F = 2000+(-6000)

= -4000 N

Hence, this is the required solution.

4 0

3 years ago