Answer:
<h2>15 Ns</h2>
Explanation:
The impulse of an object can be found by using the formula
impulse = force × time
From the question we have
impulse = 0.5 × 30
We have the final answer as
<h3>15 Ns</h3>
Hope this helps you
Answer:
A. 10 joules
Explanation:
Given parameters:
Mass of object = 4kg
Speed = 5m/s
Unknown:
Kinetic energy of the the object = ?
Solution:
Kinetic energy is the energy due to a moving body.
So;
mathematically;
K.E = 
x m v²
m is the mass
v is the velocity
K.E = x 4 x 5 = 10J
Answer:
a. 125 kJ
Explanation:
Her total energy is the same as the potential energy she had at the top of the hill:
PE = mgh
= (52 kg)(9.8 m/s^2)(245 m) = 124,852 J
≈ 125 kJ . . . . matches choice A
_____
After skiing down 112 m, some of her initial energy is converted to kinetic energy, and some remains as potential energy. We assume the ski slope is essentially frictionless, and air resistance is negligible.
The mass of the cylinder <em>D</em> is obtained by integrating the density function over <em>D</em>:
With 
, and
the mass would be
