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
Archy [21]
3 years ago
14

An athlete whose mass is 97.0 kg kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with cons

tant acceleration, a barbell that weighs 420 N N . He lifts the barbell a distance of 0.65 m m in a time of 1.5 s s . Part A Use Newton's laws to find the total force that his feet exert on the ground as he lifts the barbell. Express your answer using two significant figures. F floor Ffloor = nothing N?
Physics
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

470 N.

Explanation:

Using equations of motion:

S = vi*t + 1/2*(a*(t^2))

Given:

S = 0.65 m

t = 1.5 s

vi = 0 m/s

0.65 = 1/2 * (a * (1.5)^2)

a = 1.3/2.25

= 0.578 m/s^2

Force = mass * acceleration due to gravity

= 92 * 0.578

= 53.16 N

Total force = 420 + 53.16

= 473.16 N

= 470 N.

You might be interested in
For a study to accurately reflect a target population behavior, it must use __________ measures.
kari74 [83]

Answer: a. both reliable and valid

The parameters used to describe a particular trait or characteristic in a human behavior should be reliable and valid, in order to determine the response of the population with respect to a particular stimulus.

4 0
3 years ago
Read 2 more answers
Anyone want to talk? whats photosynthesis
choli [55]
<h2>Answer:</h2>

<h2>Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities</h2>

<h2>MaRk mE aS braiNliest ❤️</h2>

4 0
3 years ago
Read 2 more answers
A large truck traveling at +15 m/s collides head-on with a small car traveling at -15 m/s, which of the following statements is
qaws [65]
A because it is +15?
3 0
4 years ago
A proton travels with a speed of 1.8×106 m/s at an angle 53◦ with a magnetic field of 0.49 T pointed in the +y direction. The ma
Likurg_2 [28]

Answer:

Magnetic force, F=1.12\times 10^{-13}\ N

Explanation:

It is given that,

Velocity of proton, v=1.8\times 10^6\ m/s

Angle between velocity and the magnetic field, θ = 53°

Magnetic field, B = 0.49 T

The mass of proton, m=1.672\times 10^{-27}\ kg

The charge on proton, q=1.6\times 10^{-19}\ C

The magnitude of magnetic force is given by :

F=qvB\ sin\theta

F=1.6\times 10^{-19}\ C\times 1.8\times 10^6\ m/s\times 0.49\ Tsin(53)

F=1.12\times 10^{-13}\ N

So, the magnitude of the magnetic force on the proton is 1.12\times 10^{-13}\ N. Hence, this is the required solution.

3 0
4 years ago
Large-scale environmental catastrophes _______.
VLD [36.1K]
I'll give just one. The eruption of Mount Tambora in 1815 was one of the volcanic eruptions with widespread damage. Mount Tambora erupted, bringing thermal waves and tsunamis that killed 38,000 people (estimated). It is not just the tsunami and thermal waves, but also the ash plume that caused a cool down on the earth's atmosphere by 5°C causing "The Year Without Summer" and caused crops worldwide to fail, or degrade causing famine. That is all I know :) have a good day.
5 0
3 years ago
Other questions:
  • The number three ball moves off with a velocity of 5 m/s. What is the final velocity and direction of the eight ball?
    14·1 answer
  • Dad gives the child on the sled a long push to set him in motion along the level surface
    5·1 answer
  • if you knew the number of valence electrons in a nonmetal atom, how would you determine the valence of the element?
    14·1 answer
  • The scientific study of the process and phenomena of aging is
    5·1 answer
  • What is universal constant (G)
    14·2 answers
  • A plane leaves the airport in Galisteo and flies 160 km at 66.0 ∘ east of north; then it changes direction to fly 260 km at 49.0
    13·1 answer
  • A.
    14·1 answer
  • Which feature causes a gap in the geologic record?
    13·2 answers
  • What element is a Transition Metal similar to Silver but has less protons?
    14·1 answer
  • A big rock falls from a height towards water below, and hits water at a speed of 12 m/s. Rock was at a height of 15 m before fal
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!