A balloon is at a height of 81m and is ascending upwards with a velocity of 12m/s. A body of 2kg weight is dropped from it. If g=10m/s2, the body will reach the surface of the earth in how much time?

For a object to be in projectile motion, what force must be acting on it

Who developed formal logic

A crime scene investigator wants to use a forensic lamp to look for particles on a carpet at a crime scene. Which technique will she use to find the particle evidence

Four soccer players are running down the field at the same speed. Player one weighs 145 pounds and is running toward the north goal, Player two weighs 175 pounds and is running toward the south goal, Player three weighs 155 pounds and is running

Two charged particles are placed 2.0 meters apart. The first charge is + 2.0 E-6 C, and the second charge is + 4.0 E-6 C. What is the electrical force between the two charges? (k = 9.0 E9 Nm^2/c^2) A. + 1.8 E-2 N and it is repulsive B. + 3.

When 2 objects collide and stick together this is referred to as

Fill in the blanks to complete each statement about the heating of Earth's surface. Earth takes in thermal energy from the Sun in a process called Sunlight strikes Earth's surface at different angles. This angle is called the angle of Done Intro

A 2.0-kg block is on a perfectly smooth (frictionless) ramp that makes an angle of 30^/circ30 ∘ with the horizontal. What is the force of the ramp on the block?

What is the difference between negative displacement and negative velocity?

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