1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zina [86]
2 years ago
7

Please help me, this is a physics test.

Physics
1 answer:
sweet-ann [11.9K]2 years ago
4 0

Answer:

a = 2 [m/s²]

Explanation:

To be able to solve this problem we must make it clear that the starting point when the time is equal to zero, the velocity is 5 [m/s] and when three seconds have passed the velocity is 11 [m/s], this point is the final point or the final velocity.

We can use the following equation.

v_{f}=v_{o}+a*t\\

where:

Vf = final velocity = 11 [m/s]

Vo = initial velocity = 5 [m/s]

a = acceleration [m/s²]

t = time = 3 [s]

11 = 5 + a*3\\6=3*a\\a= 2[m/s^{2} ]

You might be interested in
If i like a boy and he dont like me what should i do? If we like each other what should i do?
crimeas [40]

Answer:

If he doesn't like you then hang out with him more but if he does then try to keep your cool

Explanation:

hope this helps

3 0
3 years ago
Read 2 more answers
An arrow is launched upward with an initial speed of 100 meters per second (m/s). The equations above describe the constant-acce
ankoles [38]

Answer:

d=510.2m

t=10.2s

Explanation:

The formulas for accelerated motion are:

v=v_0+at\\x=x_0+v_0t+\frac{at^2}{2}

From them we can get v^2=v_0^2+2ad.

We have:

v-v_0=at\\t=\frac{v-v_0}{a}

And substitute:

x=x_0+v_0(\frac{v-v_0}{a})+\frac{a}{2}(\frac{v-v_0}{a})^2\\x-x_0=\frac{v_0(v-v_0)}{a}+\frac{(v-v_0)^2}{2a}

We multiply both sides by 2a, and continue:

2a(x-x_0)=2v_0(v-v_0)+(v-v_0)^2=2v_0v-2v_0^2+v^2+v_0^2-2vv_0=v^2-v_0^2

Being d the displacement x-x_0, we have v^2=v_0^2+2ad

For our exercise, we will write this as:

d=\frac{v^2-v_0^2}{2a}

And taking upwards direction positive and imposing final velocity 0m/s (for maximum height), we have:

d=\frac{-v_0^2}{2a}=\frac{-(100m/s)^2}{2(-9,8m/s^2)}=510.2m

For the time we use:

t=\frac{v-v_0}{a}=\frac{-v_0}{a}=\frac{-(100m/s)}{(-9.8m/s^2)}=10.2s

6 0
3 years ago
What is the goal of a market economy
Arlecino [84]
Economic security
Economic stability
Economic growth
Economic freedom
Economic efficiency
Economic equity
8 0
2 years ago
A 10- kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The
Temka [501]

Answer:

1m/s^2

Explanation:

Mass of block=10 kg

Applied horizontal force =F=20 N

Friction force=f=10 N

We have to find the acceleration of block.

Net force=Applied horizontal force-friction force

ma=F-f

Where F= Horizontal force

f=Friction force

m=Mass of object

a=Acceleration of object

10a=20-10=10

a=\frac{10}{10}=1 m/s^2

Hence, the acceleration of the block=1m/s^2

4 0
3 years ago
If an astronaut weighs 900 n on earth, what does he weigh on the planet venus?
Ber [7]
Use w=m*g value of g is 1.67m/s^2
5 0
3 years ago
Other questions:
  • Can someone please help me with questions 5 and 6 you would be so amazing! :)
    14·1 answer
  • Which statement is true about industrial-organizational psychologists? They apply psychological principles to the workplace. The
    7·2 answers
  • You feel a static electric shock when free electrons build up on your body then you touch a
    12·1 answer
  • Hyperkinetic means too little movement true or false?
    15·1 answer
  • A football player runs from his own goal line to the opposing team's goal line, returning to his ten-yard line, all in 26.6 s. C
    5·1 answer
  • A man weighs 90 N on the surface of earth of radius R at what height above the surface of earth is weight will be 40 N.
    5·1 answer
  • If a 12 V battery is connected to a light bulb with a resistance of 2 ohms, how much current will flow through the light bulb?
    15·1 answer
  • Please help very easy 5th grade work giving brainliest
    10·1 answer
  • Consider the diagram of a pendulum's motion shown above. A pendulum can be used to model the change from potential energy
    6·1 answer
  • FInal physics question please help asap
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!