Based on your knowledge of the gravitational force near the surface of the Earth

Question

Based on your knowledge of the gravitational force near the surface of the Earth, and on Newton's second law, explain the sign and magnitude of the acceleration of the coin in Question 3 during the three portions of its motion on the way up. at the instant when it reaches its highest point, and on the way down. Based on the way the velocity is changing, explain the sign and magnitude of the acceleration of the coin in Question 3 during the three portions of its motion: on the way up, at the instant when it reaches its highest point, and on the way down. Write down the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower's hand at t = 0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of the coin is -9.8 m/s^2. What is the weight of a ball of mass 55.0 kg? What is the magnitude of the gravitational force acting on it? What force would a spring scale read if the ball were hanging from it? Consider two identical balls. One is hanging on a spring scale in the laboratory, and one is hanging on a spring scale 25 km above the surface of the Earth Which ball weighs more? Which ball has a larger mass? When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table to exert just the right normal force to balance the weight of the object. Is there any limit to how large the normal force can be?

Explanation / Answer

6.

V=U+at

Where V=final velocity

U=Initial Velocity

a= accelreation due to gravity =-9.8 m/s

=>V=15-9.8t

---------------------------------------------------------------------------------------------------------------------------

7.

a)

Weight of the ball

W=mg =55*9.8

W=539 N

b)

Gravitational force acting on the ball

F=mg =539 N

c)

Spring scale would read the same force

F=539 N

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.