Net force is the total of all forces acting in the object.
Answer:
d) 15.12 N
e) 15.12 N
Explanation:
Draw a free body diagram of the each block.
Block A has three forces on it: weight force mAg pulling down, normal force N pushing up, and tension force T pulling down.
Block B has two forces on it: weight force mBg pulling down, and tension force T pulling up.
Sum of forces on A in the y direction:
∑F = ma
T + N − mAg = mAa
N = mAa + mAg − T
N = mA (a + g) − T
Sum of forces on B in the y direction:
∑F = ma
T − mBg = mBa
T = mBa + mBg
T = mB (a + g)
Plug in values:
T = (1.80 kg) (-1.60 m/s² + 10 m/s²)
T = 15.12 N
N = (3.60 kg) (-1.60 m/s² + 10 m/s²) − 15.12 N
N = 15.12 N
So the answers to (d) and (e) are both 15.12 N.
Answer:
Explanation:
Relative velocity is defined as the velocity of an object B in the rest frame of another object A.
Answer:
m = 50 [kg]
Explanation:
The potential energy can be calculated by means of the following equation.
where:
Ep = potential energy = 735 [J]
m = mass [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 1.5 [m]
Now replacing:
![735=m*9.81*1.5\\m = 50 [kg]](https://tex.z-dn.net/?f=735%3Dm%2A9.81%2A1.5%5C%5Cm%20%3D%2050%20%5Bkg%5D)
No it isn't. Speed and direction are both components of velocity.
When you run around the track at 5 km/hr, although your speed is
constant, your direction keeps changing, so your velocity does too.
