HELP ASAP TIMER
1 answer:
Answer:
b Use a balance to determine the mass of the car. Use a motion sensor to measure the speed of the car at a time of 0s and at time of 5s .
Explanation:
The right way to measure the net force on the car is take the measurement of its mass then find the speed of the car within the time 0s to 5s.
This is because the net force acting on car is given as;
Force = mass x acceleration
By using the balance, the mass is determine
Acceleration is the rate of change of velocity with time.
Acceleration =
v is the final velocity
u is the initial velocity
t is the time taken
Now,
Force = mass x
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Answer:
26m/s²
Explanation:
Given parameters:
Mass of the student = 60kg
Weight = 1560N
Unknown:
Acceleration due to gravity = ?
Solution:
Weight is a force on a body due to gravity;
Weight = mass x gravity
Insert the given parameters and solve;
1560 = 60 x gravity
Gravity = = 26m/s²
When we drop the stone in air then during its motion in air the net force on the stone is due to gravity
so its net force is given as
here we know that
so we have
now as soon as it will enter into the water then it will have resistive force due to water as well as buoyant force due to water on it in opposite direction
so the net force on the stone will decrease
so as soon as it will enter into the water the acceleration of stone will decrease due to which the rate of increase in speed of the stone will decrease as it will enter into the water