108 Answered Questions for the topic Acceleration

10/14/19

The 100m dash can be run by the best sprinters in 10.0 s.

A 65 kg sprinter accelerates uniformly for the first 50m to reach top speed, which he maintains for the remaining 50 meters.a) What is the average horizontal component of force exerted on his feet... more

10/13/19

if i drop a ball out of a window that is 5.00m above ground, how long will it take to hit the ground? what is the acceleration of a north moving truck slowing down?

what is the acceleration of a north moving truck slowing down?what is the direction of acceleration of an eastward moving sprinter speeding up?how fast is 337m/s in mph?

08/02/19

Small car colliding with large truck?

A small car collides with a large truck. Why do both vehicles experience the same magnitude of force? Wouldn't the large vehicle experience less force than the small one?

08/02/19

Why can't charged objects exert electrostatic forces on heavier objects?

We know that, for example, amber rubbed with fur attracts bits and pieces of straw, paper, Styrofoam, etc. which are all light objects. Why don't they attract heavier objects, likewise?

06/15/19

what is the initial speed of the ball when it is projected into the air

A small ball is projected vertically upwards from a height of 3 meters above the groundThe ball hits the ground 2 seconds laterIf air resistance is negligible and the acceleration due to gravity is... more

06/14/19

What is the acceleration of the rocket?

A rocket is fired upwards, starting at rest, and accelerating at a constant rate. During the 15th 1 second interval, the rocket travels 600 meters. What is the acceleration of the rocket?Please... more

05/13/19

A car traveling down the road to the east experiences a negative acceleration. Which item below is a possible outcome? (Select all that apply.)

1.The car slows down, comes to a stop for an instant, then the car begins to move backwards.2.The car speeds up.3.The car slows down.4.The car comes to a stop.

05/13/19

At what speed (in mph) was the potato launched from the gun?

Acceleration due to gravity on Earth is 9.81 m/s2 (32 ft/s2) toward the center of the planet. A potato is launched straight up from a potato gun and rises for 3.4 seconds before beginning to fall... more

05/13/19

What is the speed of the car after the braking?

A driver moving at 25 m/s applies his brakes for 1.5 seconds causing a deceleration of 2.3 m/s2. (Hint: deceleration is just negative acceleration; the sign is important to your calculation.)

04/28/19

The acceleration due to gravity on the surface of Mars is 3.7 m/s^2. What is the acceleration due to gravity at a distance of 1 mars radius above the surface of Mars?

The acceleration due to gravity on the surface of Mars is 3.7 m/s^2. What is the acceleration due to gravity at a distance of 1 mars radius above the surface of Mars?What equation should I use for... more

04/22/19

Compute the acceleration of the two cars after collision

Car A was stopped when Car B hit Car A from behind The two cars lock together and skid for 10 m before coming to a rest The mass of Car A is 1800kg and the mass of Car B is 1200kg The coefficient... more

03/19/19

Kinematics - Using equations

A bicycle travelling at 5ms^-1 undergoes uniform acceleration and travels a distance of 600m in 20s.Calculate:a) accelerationb) velocity at the end of 20s

09/30/18

A plane flies 1200 km in 2.5 hours. What is the average speed of the flight?

The answer choices are A) 480 km/hr B) 300 km/hrC) 1200 km/hrD) 200 km/hr

06/22/18

A car is traveling east at 25 m/s when it turns due north and accelerates to 35 m/s, all during a time of 6.0 s. Find magnitude of cars accelrtn.

A car is traveling east at 25 m/s when it turns due north and accelerates to 35 m/s, all during a time of 6.0 s. Calculate the magnitude of the car's average acceleration.

05/07/18

Motion in 3d - acceleration and its components

Hi   I have found the vector for the acceleration of a particle in 3d, however I have been asked now to give its component that is tangential to the trajectory of the particle. Can I get some... more

05/05/18

What is the acceleration for a car driving on the road?

What is the acceleration for a car driving on the road?

04/21/18

Find the angular velocity of the system after 12 seconds

The angular acceleration of a system is described by the following equation: a(t)=d^2Radians/dt^2=10cos (5t).  Find the angular velocity of the system in radians after 14 seconds

03/02/18

Distance traveled derivative

The distance S covered by a car after t sec is given by: s=-t3 + 8t2 +20t (0≤t≤6)   Find the general expression for the car's acceleration at any time t (0≤t≤6). Show that the car is decelerating... more

01/21/18

A car is alone at a red light. When the light turns green, it starts at constant acceleration. After traveling 100.0 m, it is traveling at 15 m/s. What is the

A car is alone at a red light. When the light turns green, it starts at constant acceleration. After traveling 100.0 m, it is traveling at 15 m/s. What is the acceleration?

01/15/18

Amber moves from her desk to the door in 17 seconds. Her speed changes from rest to .5m/s. What is Amber’s average acceleration?

I don’t No the answer to this one and I cant figure out how to do it.

01/15/18

What is the acceleration of the satellite? Direction of the acceleration? What is the name of the force providing the acceleration? Speed of satellite?

a 1000kg satellite orbits the Earth at a radius of 50,000 km.  What is the acceleration of the satellite? The direction of the acceleration? What is the name of the force providing the... more

01/15/18

What acceleration is needed to stop in time from hitting the wall?

Chris drives a 1200 kg car straight at a brick wall. He is accelerating at a rate of 4 m/s^2. He started from rest and accelerated for 3 seconds, and began to hit the brakes when he was 9m away... more
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