Physics Answers

A spring has constant of 875N/m. What hanging mass will cause this spring to stretch 4.5m ?

A hanging 7.5kg object stretches a spring 1.1 m What is the spring constant.?

A spring is stretched 0.75 m by using a force of 30N. What is the constant.?

In celebration of winning the Super Bowl Tom Brady 102 kg throws a football 0.4 kg straight up in the air. As the ball falls toward the ground there is a perpendicular cross wind coming from the right with a force of 25 N and a vertical air resistance force of 2N draw a free body diagram find the magnitude and direction of the resultant force acting on the football

Consider three point charges q1= 5.0 μC , q2 = -2.0 μC and q3 = 5.0 μC, located at the corners of a triangle which has a coordinate of (0, 0) , (0, a) and (a, a) respectively. If a = 0.10 m, find

 a) the resultant force on q3.

 b) the magnitude and the direction of the resultant force on q3 

A crane leaves a load of 500kg very slow throw a vertical distance of 75cm. Calculate the work done against gravity of g=10ms

A rail road of length 20m is heated through 30°c to 100°c. calculate the gap between the rails

A boulder of mass 100 kg is pulled in some direction with a net force whose components are

A.

B.

C.

D.

= 100 N, 𝐹 = 200 N.

A 10 g bullet travels horizontally at 2000 m•s-¹ passung through a 2kg pendulum which then moves initially horizontally at 4m•s-¹. Assume that the pendulum loses no mass as the bullet moves through it. Calculate the final speed of the bullet.

A man is marooned at rest on level frictionless ice. In desperation, he hurls his shoe to the right at 4.1m/s. If the man weighs 385 N and the shoe weighs 2.1N, the man moves to the left with a speed of...