Answer:
1.) 0.075 km/min
2.) 0 km/min
3.) -0.15 km/min
Explanation:
<u>Formula:</u>
<u />
- s = speed
- d = distance
- t = time
<u />
<u>Calculating the speed:</u>
<u />
1.)
2.)
3.)
Answer:
= 8.46 × 10³N
Explanation:
W = 1.3 × 10⁴
v₁ = 0
v (friction) = 95km/h = 26.4 m/s
t = 5s
f = 1450N
mass of body = W / g
=1.3 × 10⁴ / 9.8
=1327 kg
v(friction) = v + at
substitute in eqn 1
26.4 = 5a
a = 5.28 m/s
Force Net = F₁ + F₂ + F₃ = ma
F (engine) = ma + F
= 1327 (5.28) + 1450
= 8.46 × 10³N
1.8N
Explanation:
Given parameters:
Mass of the hockey puck = 0.15kg
Acceleration = 12m/s²
Unknown:
Net force = ?
Solution:
According newton's second law of motion "the net force on a body is the product of its mass and acceleration".
Force = mass x acceleration
Input the variables;
Net force = 0.15 x 12 = 1.8N
learn more:
Newton's law of motion brainly.com/question/11411375
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Answer:
Explanation:
According to the <u>law of universal gravitation</u>, which is a classical physical law that describes the gravitational interaction between different bodies with mass:
Where:
is the module of the force exerted between both bodies
is the universal gravitation constant.
and are the masses of the pencil and the teenager, respectively.
is the distance between both bodies
Solving for :
This is the force of gravitational attraction between the pencil and the teenager, which is very small in this case