All categories

3 years ago

How much force would you need to cause a 20kg object to accelerate in a straight line to 20m/s2?

Physics

1 answer:

elena-14-01-66 [18.8K]3 years ago

8 0

Answer:

400 Newtons

Explanation:

Force = Mass x Acceleration. (Newton's 2nd law)

Mass= 20kg Acceleration = 20 m/s^2

Force=20 kg x 20 m/s^2 = 400 kg/s^2=400 newtons(400 N)

You might be interested in

A 148 g ball is dropped from a tree 11.0 m above the ground. With what speed would it hit the ground

forsale [732]

Answer:

14.68m/s

Explanation:

As per the question, the data provided is as follows

Mass = M = 0.148 kg

Height = h = 11 m

Initial velocity = U = 0 m/s

Final velocity = V

Gravitational force = F

Mass = M

Based on the above information, the speed that hit to the ground is

As we know that

Work to be done = Change in kinetic energy

$F ( S) = (\frac{1}{2} ) M ( V^2 - U^2 )$

$M g h = (\frac{1}{2} ) M ( V^2 - U^2 )$

$g h = (\frac{1}{2} ) ( V^2 - U^2 )$

$V^2 - U^2 = 2gh$

$V^2 - 0 = 2gh$

$V = \sqrt{2 g h}$

$= \sqrt{2\times9.8\times11}$

= 14.68m/s

7 0

3 years ago

Help

lakkis [162]

Set up a unit conversion problem, arrange units to convert minutes to seconds, then cancel all time units.

8.3 minutes x (60 seconds/1 minute) x ( 3.00x10^8 meters/1 second) = 149,400,000,000 meters

Since the time is the term with the fewest number of significant figures (2), your answer should only be expressed with two sig figs as well.

1.5x10^11 m

7 0

3 years ago

A hydraulic jack has a small piston area A1 = 2 m^2 and the large piston area A2 = 20 m^2. A 1500 Kg car needs to be lifted. a)

Alex777 [14]

Answer:

1471.5 Newton

Explanation:

Small piston area = A₁ = 2 m²

Large piston area A₂ = 20 m

m = Mass of car = 1500 kg

g = Acceleration due to gravity = 9.81 m/s²

Force

F = mg = 1500×9.81 = 14715 N

Force applied by car is 14715 N

a) Pascal's law

$\frac{F_1}{A_1}=\frac{F_2}{A_2}\\\Rightarrow F_1=F_2\frac{A_1}{A_2}\\\Rightarrow F_1=14715\frac{2}{20}=1471.5$

Force required is 1471.5 Newton

b) Mechanical advantage

$\frac{F_2}{F_1}=\frac{14715}{1471.5}=10$

Mechanical advantage is 10

5 0

3 years ago

Need helppp number 5

horsena [70]

Answer:

1768 meters

Explanation:

Distance = speed x time.

(340 m/s) x (5.2 s) = 1768 m

5 0

3 years ago

Read 2 more answers

The ______________________ of ______________________ in the cores of terrestrial worlds are responsible for ____________________

Sedaia [141]

Hi there! I’m bored and waiting for someone to respond to my question so I’m scrolling

5 0

2 years ago