Physics Answers

Collision with a Stationary Object

The camera can be oriented any way the player wants. If the bumper is now the plane defined by vectors [30 100 –50] and [200 –50 –25], and the cue ball has an incoming velocity of [20 –10 –50] when it hits, what should its resulting velocity be?

A 9 kg block is attached to a spring on the side of a wall. The spring is compressed 15 cm and let go. The force of the spring acts on the block in the positive x-direction and the force of gravity acts on the block in the negative y-direction. If the spring constant of the spring is 240 N/m, what is the magnitude of the net force on the block?

Planet X has a mass of 7.4×1026 kg and is 3.3×1010 m from Planet Y which has a mass of 9.8×1026 kg. What is the force of gravity between Planet X and Planet Y in Scientific Notation?

A plane’s propellers push a plane East with a force of 1840 N. A wind is exerting a 1330 N force on the plane West. What is the net force on the plane?

The curre Earth, called plate tectonics, tells us that the continents are in constant motion. Assume that the North American continent can be represented by a slab of rock 4700 km on a side and 28 km deep and that the rock has an average mass density of 2940 kg / (m ^ 3) The continent is moving at the rate of about 4.2 cm / y * e * a * r . What is the mass of continent ? Answer in units of kg
What is the kinetic energy of the continent
a jogger (75kg) has the same kinetic energy what would his speed be?

a crate is pushed along a floor with a force of 450 N. if frictional force is 120 N and gravitational force is 4000 N what is the net force of the crate?

a pendulum clock is losing time .is the period too long or too short? should pendulum be made longer or shorter

Which of the following factors does NOT affect the resistance of a metallic conductor at
constant temperature?
A. Type of the conductor.
B. Length of the conductor.
C. Surface area of the conductor.
D. Cross-sectional area of the conductor.

Need to find final velocities in Elastic collision with coefficient of restitution.

The cars don't get stuck together. A car with a mass of 1500kg has a velocity of [30 –20 –40] when it hits another car of mass 1800kg going [–50 40 –20]. Using e = 0.5, what should their final velocities be?

Determine the net heat radiated by the black body disc of mass 6g and radius 4cm at 400C,initially kept at 300C.