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
Kruka [31]
2 years ago
7

A rock accelerates down a hill at 7 m/s2 with a force of 30.0 N. What is the mass of the rock?

Physics
1 answer:
choli [55]2 years ago
3 0

Answer:

we know thatv

F =m×a

so, m = F/a

m =30/7

m=30/7kg

You might be interested in
A 0.55 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1550 J and at its highest point is 1
SCORPION-xisa [38]

Answer:

a). 53.78 m/s

b) 52.38 m/s

c) -75.58 m

Explanation:

See attachment for calculation

In the c part, The negative distance is telling us that the project went below the lunch point.

5 0
2 years ago
Place a small object on the number line below at the position marked zero. Draw a circle around the object. Mark the center of t
Viefleur [7K]
It’s is D bc it is and idk you should do it
6 0
3 years ago
Why a body in uniform velocity is zero acceleration ?​
seropon [69]
Uniform velocity means no Net force and therefore no acceleration. Acceleration only happens when the velocity changes.
4 0
3 years ago
A child on a tricycle is moving at a speed of 1.40 m/s at the start of a 2.25 m high and 12.4 m long incline. The total mass is
goblinko [34]

Answer:

The work done by the child as the tricycle travels down the incline is 416.96 J

Explanation:

Given;

initial velocity of the child, v_i = 1.4 m/s

final velocity of the child, v_f = 6.5 m/s

initial height of the inclined plane, h = 2.25 m

length of the inclined plane, L = 12.4 m

total mass, m = 48 kg

frictional force, f_k = 41 N

The work done by the child is calculated as;

\Delta E_{mech} = W - f_{k} \Delta L\\\\W = \Delta E_{mech}  + f_{k} \Delta L\\\\W = (K.E_f - K.E_i) + (P.E_f - P.E_i) + f_{k} \Delta L\\\\W = \frac{1}{2} m(v_f^2 - v_i^2) + mg(h_f - h_i) + f_{k} \Delta L\\\\W = \frac{1}{2} \times 48(6.5^2 - 1.4^2) + 48\times 9.8(0-2.25) + (41\times 12.4)\\\\W = 966.96  \ - \ 1058.4 \ + \ 508.4\\\\W = 416.96 \ J

Therefore, the work done by the child as the tricycle travels down the incline is 416.96 J

5 0
3 years ago
A motor has a rating power of 20 W and motor is used for 10 s. Calculate the
zepelin [54]

Explanation:

oii ay school ens?

6 0
3 years ago
Other questions:
  • What is the strength of the electric field 0.020 m from a 12 uc charge?
    14·1 answer
  • What is radiation? What are the different types? ​
    15·2 answers
  • What is 1.0 x 10^9 in standard form?
    9·1 answer
  • What is the melting point of substance A?
    5·1 answer
  • Consider the circuit. Switches are added at points A, B, C, and D. All the switches are closed EXCEPT the switch at position D,
    14·2 answers
  • A rock falls from a high cliff and hits the ground in 6.5 seconds. What is the final velocity?
    7·1 answer
  • Un automóvil que va a 36Km/h acelera durante 8segundos hasta llegar a una velocidad de 108 Km/h y luego frena hasta detenerse en
    9·1 answer
  • The most pressing problem in the Chesapeake Bay is
    6·2 answers
  • A bus manufacturer decides to double a window's area in order to give passengers a
    14·1 answer
  • How does the tension in your arms compare when you let yourself dangle motionless by both arms and by one arm
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!