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
soldi70 [24.7K]
3 years ago
13

John pushes his brother Danny on a skateboard. John applies a force of 29 N and Danny's acceleration is 0.4 m/s

Physics
2 answers:
belka [17]3 years ago
4 0

Answer:

50

Explanation:

Mumz [18]3 years ago
4 0

Answer:

The combined mass of Danny and his skateboard = m = 72.5 kg

Explanation:

Force applied by john = F = 29N  

Danny’s Acceleration = a = 0.4 m/s  

Combined mass of Danny and his skateboard = m = ?

According to Newton’s second law of motion:

                                   F = ma  

                                  m = F/a  

                                  m = 29/0.4

                                  m = 72.5 kg

Hence, the combined mass of Danny and his skateboard will be 72.5 Kg.

You might be interested in
Everyday activities do NOT produce significant muscle growth because:
Reil [10]

Answer:

When elements bond together or when bonds of compounds are broken and form a new substance

Explanation:

7 0
3 years ago
Read 2 more answers
starting from a stop a traffic signal, a car speeds up to 20 m/s in 5 seconds. calculate the acceleration of the car.
Ira Lisetskai [31]

Answer:

5.867 m/s^2

Explanation:

Initial Speed > 0 m/s

Final Speed > 20 m/s

Time > 5 sec.

8 0
3 years ago
In deep space, there is very little friction. Once they launch a probe into deep space, where there are no external forces actin
Charra [1.4K]

Answer:

move at constant velocity.

Explanation:

Newton's first law (also known as law of inertia) states that:

"when the net force acting on an object is zero, the object will keep its state of rest or if it is moving, it will continue moving at constant velocity".

In the case of the probe, friction in deep space is negligible, therefore when the engine is shut down, there are no more forces acting on the probe: the net force therefore will be zero, so the probe will move at constant velocity.

5 0
3 years ago
Read 2 more answers
According to Newton's Law of Cooling, if a body with temperature T 1 is placed in surroundings with temperature T 0, different f
Mila [183]

We can substitute the given values into the equation for T, given the surrounding temperature T0 = 0, initial temperature T1 = 140, constant k = -0.0815, and time t = 15 minutes.

T = 0 + (140 - 0)e^(-0.0815*15) = 140e^(-1.2225) = 41.23°F

3 0
3 years ago
Read 2 more answers
Calculate the number of electrons passing a point in the wire in 1 min when the current is 1 A
Vera_Pavlovna [14]

Explanation:

When one coulomb charge passes through any cross section of the wire per second,the current passing is one ampere. Charge of electron ,e=1.6X10^-19C. n=1/(1.6X10^-19)=6.25X10^18.Sep 17, 2017

7 0
3 years ago
Other questions:
  • two cars are moving at constant speeds in a straight line along a major highway. The first is travelling at 20ms^-1 and the seco
    14·1 answer
  • Which field(s) are created by an electron when it moves?
    7·2 answers
  • 1. In a biology experiment the number of yeast cells is determined after 24 hours of growth at
    5·1 answer
  • What are balanced forces?
    15·2 answers
  • Which of the following describes an ionic compound (or what is true for ionic compounds)?
    6·1 answer
  • What type of solar radiation does not reach the surface of the earth?
    6·1 answer
  • Which measurement is used to determine if an object has balanced forces
    13·1 answer
  • Which of the following best describes how nuclear decay rates can be altered?
    6·1 answer
  • Which of the following shows acceleration? *
    8·2 answers
  • A pendulum bob executing simple harmonic motion has 2cm and 12Hz as amplitude and frequency respectively. Calculate the period o
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!