Answer:
t = 6.63 s
Explanation:
Given that,
Initial velocity of the puck, u = 7.3 m/s
Deacceleration of the puck, a = -1.1 m/s²
Distance traveled, d = 5 m
We need to find the time the goalie have to stop the puck. Using equation of motion.
v = u +at
v = 0 (stops)
So,
So, the required time is 6.63 seconds.
Answer:
Net force of the object is zero.
Explanation:
When an object is going to the left at constant velocity, this means there is no acceleration. Hence, no force. Had there been force,acceleration had been inevitable. Therefore, we can say that when an object moves with a constant velocity and in same direction, the net force on the object is zero.
Answer:
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Explanation:
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Answer: Gravitational force
Explanation:
The law of universal gravitation states that the force of attraction (F) between two bodies is directly proportional to their masses m1 and m2, and inversely proportional to the square of the distance (R) seperating them.
Thus, it is expressed mathematically as:
F = Gm1m2/R²
where,
- G is the gravitational constant with a value of 6.7 x 10^-11 Nm2/kg2
- F is the Gravitational force (unit is Newton)
- m1 and m2 are the masses of the two bodies (unit is kilograms)
- R is the distance seperating the two bodies. (unit is metres)
Thus, the formula f=G(m1m2)/R² help us find the gravitational force.
