Answer:
0.5 secs
Explanation:
F = m( v - u) /t
Mass m = 1000kg
Velocity v = 40m/s because it came to rest
time t = ?
Force = 80kN
= 80 x 1000 = 80000N
Therefore,
80000 = 1000 x 40 /t
Cross multiply
t x 80000 = 40000
Divide both sides by 80000
t = 40000/80000
t = 0.5 secs
3.00 is my correct answer this is what my teacher told me.thanks
Answer :
The time is
(B) is correct option.
Explanation :
Given that,
Diameter = 100000 light year
Velocity = 0.99 c
We need to calculate the time
Using formula of time
Put the value into the formula
Hence, The time is
Impulse is also known as the change in momentum of an object. Momentum has an equation of,
momentum = m x v
where m is mass and v is velocity. Therefore, impulse has a formula which is,
impulse = m x (v₂ - v₁)
Substituting the known values in the equation,
impulse = 975 kg x (3 m/s - 0.5 m/s)
impulse = 2437.5 kg m/s
Answer:
Option D
48 N
Explanation:
From Newton's law of motion we deduce that the magnitude of force is a product of mass and acceleration hence expressed as, F=ma where F is the magnitude of force, m is the mass of the object and a is the acceleration of the cart. Substituting 24 kg for m and 2 for acceleration then
F=24*2= 48 N