The student's vertical speed when he was thrown out = 14.14 m/s
Speed of the student if he hit the ground = 14.14 m/s
Explanation:
Step 1:
It is given that the student reached a maximum height of 10 meters when he was thrown out. The initial speed with which he was throw is to be estimated.
Step 2:
The equation of motion connecting initial velocity, final velocity and distance is where v is the final velocity, u is the velocity with which he was thrown, a is acceleration due to gravity and s is the height.
The final velocity at the highest point 10 meters will be 0
s = 10 m
a = -10 m/
0 = + 2*(-10)*10
u = = 14.14 m/s
Step 3:
The final speed when the student hits the ground will be the same as initial speed of the student when he was thrown out.
So the final speed of the student if he hit the ground would be 14.14 m/s
Step 4:
Answer:
The student's vertical speed when he was thrown out = 14.14 m/s
Speed of the student if he hit the ground = 14.14 m/s
Answer:
1) Time interval Blue Car Red Car
0 - 2 s Constant Velocity Increasing Velocity
2 - 3 s Constant Velocity Constant Velocity
3 - 5 s Constant Velocity Increasing Velocity
5 - 6 s Constant Velocity Decreasing Velocity
2) For Red and Blue car y₂ = 120 v = = = 20 m/s
We get the same velocity for two cars because it is the average velocity of the car at the given interval of time. It is measured for initial and final position.
3) At t = 2s, the cars are the same position, and are moving at the same rate
Position - same
Velocity - same
The position-time graph shares the same spot for two cars.
Explanation:
Given that,
Voltage of household line, V = 110 V
Power of the hairdryer, P = 1650 W
During use, the current is about 1.95 cm from the user's hand.
(a) Power is given by :
(b) Again the power is given by :
R is resistance of the dryer
(c) The magnetic field produced by the dryer at the user's hand is given by :
Hence, this is the required solution.
Answer:
A thermometer is an instrument that measures temperature.
Explanation: