javane

A car is coasting backwards downhill at a speed of 3.2 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 5.0 m/s. Assuming that the uphill is the positive direction, what is the car's average acceleration?

A 1.0-kg mass (mA) and a 7.0-kg mass (mB) are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move. Find the acceleration of the larger mass

A helicopter is rising at 5.5 m/s when a bag of its cargo is dropped. (Assume that the positive direction is upward.) (a) After 1.5 s, what is the bag's velocity? (b) How far has the bag fallen?

The driver of a car going 90.0 km/h suddenly sees the lights of a barrier 35.0 m ahead. It takes the driver 0.75 s to apply the brakes, and the average acceleration during braking is -10.0 m/s2. (b) What is the maximum speed at which the car could be movi...

A 873-kg (1930-lb) dragster, starting from rest completes a 403.7-m (0.2523-mile) run in 4.920 s. If the car had a constant acceleration, what would be its acceleration and final velocity?

A propeller slows from 490 rev/min to 177 rev/min in 3.50 s. What is its angular acceleration?

An athlete whirls in a 7.10-kg hammer tied to the end of a 1.2 m chain in a horizontal circle, as shown in the figure below. The hammer makes one revolution in 1.0 s. (a) What is the centripetal acceleration of the hammer? (b) What is the tension in the c...

An automobile wheel with a 9.00-cm radius and the radius to the rim is 7cm, as shown below, rotates at 2.50 rad/s. How fast does a point 6.50 cm from the center travel? 1 cm/s

Divers in Acapulco dive from a cliff that is 56 m high. If the rocks below the cliff extend outward for 23 m, what is the minimum horizontal velocity a diver must have to clear the rocks?

Design a program that lets the user enter the total rainfall for each 12 months into an array. The program should calculate and display the total rainfall for the year the average monthly rainfall, and the month with the highest and lowest amounts. In pse...

thnak you i have the equation studied now