Questions from College Physics

Q: A block of mass m = 5.8 kg is pulled

A block of mass m = 5.8 kg is pulled up a θ = 25° incline as in Figure P4.24 with a force of magnitude F = 32 N. (a) Find the acceleration of the block if the incline is fricti...

Q: Analyze the motion of a rock dropped in water in terms of

Analyze the motion of a rock dropped in water in terms of its speed and acceleration as it falls. Assume a resistive force is acting on the rock that increases as the velocity of the rock increases....

Q: A rocket takes off from Earth’s surface, accelerating straight up at

A rocket takes off from Earth’s surface, accelerating straight up at 72.0 m/s2. Calculate the normal force acting on an astronaut of mass 85.0 kg, including his space suit.

Q: A man exerts a horizontal force of 125 N on a crate

A man exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. (a) If the crate doesn’t move, what’s the magnitude of the static friction force? (b) What is the minimum possible value of...

Q: A horse is harnessed to a sled having a mass of 236

A horse is harnessed to a sled having a mass of 236 kg, including supplies. The horse must exert a force exceeding 1240 N at an angle of 35.0° in order to get the sled moving. Treat the sled as a poin...

Q: A block of mass 55.0 kg rests on a slope

A block of mass 55.0 kg rests on a slope having an angle of elevation of 25.0°. If pushing downhill on the block with a force just exceeding 187 N and parallel to the slope is sufficient to cause the...

Q: A dockworker loading crates on a ship finds that a 20.

A dockworker loading crates on a ship finds that a 20.0-kg crate, initially at rest on a horizontal surface, requires a 75.0-N horizontal force to set it in motion. However, after the crate is in moti...

Q: A 6.0-kg object undergoes an acceleration of 2

A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant force acting on it? (b) If this same force is applied to a 4.0-kg object, what acceleration is produce...

Q: Suppose the coefficient of static friction between a quarter and the back

Suppose the coefficient of static friction between a quarter and the back wall of a rocket car is 0.330. At what minimum rate would the car have to accelerate so that a quarter placed on the back wall...

Q: The coefficient of static friction between the 3.00-kg

The coefficient of static friction between the 3.00-kg crate and the 35.0° incline of Figure P4.31 is 0.300. What minimum force F( must be applied to the crate perpendicular to the incline...