Other Physics Answers

Determine what is asked. Show all pertinent parts of the solution (GUFSA), make sure to express your answer with correct number of significant figures.

1. Displacement at t = 3s to t = 5s
2. Velocity at t = 6s, considering that the initial velocity is 4m/s

Two strings support a load of weight 7.5N, as shown in the figure below;

One string has a tension 𝑇1 and is at an angle 50° to the horizontal. The other string has a tension

𝑇2 and is at angle 40° to the horizontal. The object is in equilibrium. Determine the values of

𝑇1 and 𝑇2 by using a vector triangle or by resolving forces.

Using the Phet Simulation, answer the following problem:

https://phet.colorado.edu/sims/html/projectile-motion/latest/projectile-motion_en.html

Problem 2: A pumpkin has a mass of 5kg and has a diameter of 1m. If the height where the cannon was placed is 3m and the angle of launched is 25 degrees, what’s the initial speed needed to hit the 20m range? What’s the maximum height before hitting the ground? Note, there’s no air resistance.

Answers: 

Solution (Screenshot from the simulation)

Using the Phet Simulation, answer the following problem: https://phet.colorado.edu/sims/html/projectile-motion/latest/projectile-motion_en.html

Problem 1: The cannonball is launched in the air with speed of 10m/s. It weighs 1kg and has a diameter of 0.15m. What angle is needed to hit the target range of 14.3m given the height where the canon was placed is 5m? Note, there’s no air resistance. 

Answers: 

Solution (Screenshot from the simulation)

When you drop a 0.44 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s2 to- ward the earth’s surface. According to New- ton’s third law, the apple must exert an equal but opposite force on Earth.

If the mass of the earth 5.98 × 1024 kg, what is the magnitude of the earth’s acceleration

toward the apple?

Answer in units of m/s .

A body which is uniformly retarded comes to rest in 10 seconds after travelling a distance of 20m. Calculate its initial velocity

A body which is uniformly retarded comes to rest in 10 seconds after travelling a distance of 20m. Calculate its initial velocity.

The apparent weight of a body holy emerged in the water is 32N and eat sweet in a is 96N Calculate the volume of the body. (Density of water =1000kgm-3,g=10ms-2