Answer:
1.) strength or energy to do an action or movement
2.)an object will jot change its motion unless acted on by an unbalanced force
Answer:
Explanation:
Let T be the tension
For linear motion of hoop downwards
mg -T = ma , m is mass of the hoop . a is linear acceleration of CG of hoop .
For rotational motion of hoop
Torque by tension
T x R , R is radius of hoop.
Angular acceleration be α,
Linear acceleration a = α R
So TR = I α
= I a / R
a = TR² / I
Putting this value in earlier relation
mg -T = m TR² / I
mg = T ( 1 + m R² / I )
T = mg / ( 1 + m R² / I )
mg / ( 1 + R² / k² )
Tension is less than mg or weight because denominator of the expression is more than 1.
Two significant figures, the 6 and the 9
Answer:
2.53 cm³
Explanation:
Volume of cylinder = πr²h; where h is the height and r is the radius and
π = 3.14 approx.
Volume = 3.14 * (1.55/2)² * 1.34 = 2.53 cm³
I divided 1.55 by 2 because we were given the diameter and not radius. Diameter = radius / 2
Let's use the equations for rectilinear motion. One particular equation is:
d = v₀t +(1/2)at²
Since it has been mentioned that the object starts from rest, then v₀ = 0. Substituting the values,
40 m = (0)(4 s) + (1/2)(a)(4 s)²
Solving for a,
a = 5 m/s²
<em>Therefore, the acceleration due to gravity is 5 m/s².</em>
