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
grandymaker [24]
3 years ago
7

I drop a penny from the top of the tower at the front of Fort Collins High School and it takes 1.85 seconds to hit the ground. C

alculate the velocity in m/s after 1.10 seconds of freefall.
Physics
1 answer:
alex41 [277]3 years ago
6 0
Assuming that air resistance is negligible you can use suvat.
you don't know the distance, the initial velocity is 0, the velocity at the point you are trying to work out is v, the acceleration is gravity (9.8ms^-2) and the time is 1.1s.
you use the equation v=u+at which gives v=0+(9.8x1.1)=10.78ms^-1
You might be interested in
A frictionless cart of mass M is attached to a spring with spring constant k. When the cart is displaced 6 cm from its rest posi
Marianna [84]

Answer:

Time period of horizontal Oscillation  = T = 2\pi\sqrt{\frac{m}{k} }

As you can see, from the equation, Period of oscillation depends upon the mass and the spring constant. Not on the displacement.

Explanation:

Solution:

As we know that:

F = Kx

Here,

K = Spring constant

x = displacement.

First, they are displacing it with 6 cm from its rest position for which Time period of the oscillation is T = 2 seconds.

But next, they want to know the effect on the time period of the oscillation if the displacement x is doubled from 6cm to 12 cm.

First of all, let us see the equation of the time period of the oscillation.

We need to check, if time period does depend on the displacement or not.

As we know,

Time period of horizontal Oscillation  = T = 2\pi\sqrt{\frac{m}{k} }

As you can see, from the equation, Period of oscillation depends upon the mass and the spring constant. Not on the displacement.

Since, K is the constant for a particular spring, we need to change the mass of the cart to change the time period.

Hence the Time period will remain same.

8 0
3 years ago
1. Given an element's atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus?
DanielleElmas [232]
C. Number of protons = atomic number; number of neutrons = mass number - atomic number
8 0
2 years ago
Read 2 more answers
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it
Tems11 [23]

Answer:

5.4 ms⁻¹

Explanation:

Here we have to use conservation of energy. Initially when the stick is held vertical, its center of mass is at some height above the ground, hence the stick has some gravitational potential energy. As the stick is allowed to fall, its rotates about one. gravitational potential energy of the stick gets converted into rotational kinetic energy.

L = length of the meter stick = 1 m

m = mass of the meter stick

w = angular speed of the meter stick as it hits the floor

v = speed of the other end of the stick

we know that, linear speed and angular speed are related as

v = r w\\w = \frac{v}{r}

h = height of center of mass of meter stick above the floor = \frac{L}{2} = \frac{1}{2} = 0.5 m

I = Moment of inertia of the stick about one end

For a stick, momentof inertia about one end has the formula as

I = \frac{mL^{2} }{3}

Using conservation of energy

Rotational kinetic energy of the stick = gravitational potential energy

(0.5) I w^{2} = mgh\\(0.5)(\frac{mL^{2} }{3}) (\frac{v}{L} )^{2} = mgh\\(0.5)(\frac{v^{2} }{3}) = gh\\(0.5)(\frac{v^{2} }{3}) = (9.8)(0.5)\\v = 5.4 ms^{-1}

7 0
3 years ago
If a 10 kg ball and a 100 kg ball we’re dropped from a plane, which would hit the ground first?
meriva

Answer: The 100 kg ball

Explanation:

3 0
2 years ago
What if the height is 85m, then how long long does it stay in the air?
wolverine [178]

Explanation:

hamburger cheesecake

6 0
3 years ago
Other questions:
  • The atmospheric temperature decreases when snow starts melting because the snow releases thermal energy from the atmosphere to m
    14·2 answers
  • Gravitational pull is greatest
    8·1 answer
  • Prehistory can be described as _____.
    8·1 answer
  • The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
    10·1 answer
  • Jill is pushing a box across the floor. Which represents the upward force perpendicular to the floor?
    8·2 answers
  • Two identical point charges are fixed to diagonally opposite corners of a square that is 0.715 m on a side. Each charge is +4.0
    5·1 answer
  • In a bi-prism experiment the eye-piece was placed at a distance 1.5m from the source. The distance between the virtual sources w
    8·1 answer
  • Give reasons why water should not be used in liquid-glass thermometer​
    14·2 answers
  • What is the angular speed of the tip of the minute hand on a clock, in rad/s?
    11·1 answer
  • A boy throws a ball vertically up it returns the ground after 10 seconds find the maximum height reached by the ball
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!