Mechanics | Relativity Answers

define the term parallax

Calculate the new force between two masses, if one of the mass is 1/3rd ,that of the other.

Using the formula for gravity, find the force of gravity on a 0.70-kg mass at Earth's surface. (The mass of Earth is 6×1024kg, and its radius is 6.4×106m.).

A tennis ball is dropped from 1.15 m above the
ground. It rebounds to a height of 0.993 m.
With what velocity does it hit the ground?
The acceleration of gravity is 9.8 m/s(Let
down be negative.)

During a baseball game, a batter hits a high
pop-up.
If the ball remains in the air for 5.26 s, how
high does it rise? The acceleration of gravity
is 9.8 m/s

If the 100kg crate of bananas hanging from the rope were to move downwards with a constant acceleration of 1.2 m/s^2. Find the tension in the rope

A Hot Wheels car is rolling along a horizontal track at speed vo = 6.0 m/s. It then comes to a ramp inclined at an angle 0 = 30° above the horizontal, and the car undergoes a deceleration of g sin 0 = 4.9 m/s2 when moving along the ramp. The track ends at the top of the ramp, so the car is launched into the air. By the time the car reaches the top of the ramp, its speed has gone down to 3.0 m/s. (a) How high is the top of the ramp (vertical height, not distance along the ramp)?

A car waits at a red light for a few seconds, and then accelerates straight ahead to 54 km/h in 3.1 s and then cruises at a constant speed for 75 m. The road is straight. Find the total distance and time travelled.