Answer:
0.83m/s forward
Explanation:
Velocity is the displacement divided by time.
Velocity =
Displacement is the distance moved in a specific direction;
→ 6meters forward
← 3meters backwards
→ 7 meters forward
Net displacement =7m + 3m = 10m forward
So;
Velocity = = 0.83m/s forward
Answer:
The angular velocity at the beginning of the interval is .
Explanation:
Given that,
Angular acceleration
Angular displacement
Angular velocity
We need to calculate the angular velocity at the beginning
Using formula of angular velocity
Where, = angular acceleration
= angular velocity
Put the value into the formula
Hence, The angular velocity at the beginning of the interval is .
Answer:
Explanation:
F = Force on the sled = 63 N
m = Mass of sled = 28.7 kg
= Coefficient of kinetic friction = 0.169
g = Acceleration due to gravity =
The force balance of the system is given by
The acceleration of the sled is .
Pressure is a measure of force per unit area
Answer: 2.13 E 4 J
Explanation: Heat absorbed = mass * specific heat capacity * change in temperature
= 0.5 * 387 * (400 - 290) J
= 0.5 * 387 * 110 J = 21285 J = 2.13 E 4 J