Physics Answers

A tow truck is pulling out a car that slid into a snow bank at the side of the road. The tow truck pulls the car with a force of 3750 N[E]. Describe the force the car is exerting on the tow truck while the tow truck is pulling the car.

A cart is pushed ahead for 3.5 s with a force of 360 N. Determine the change in momentum of the cart. Show your work. You can take a photo of your notes. 

A high-performance car initially travelling 97.2 km/h came to a stop in just 2.9 s. The mass of the car and its contents was 1850 kg. What was the magnitude of the average net force (braking force) on the car while it decelerated?

1.7 x 10⁴N

4.9 x 10⁴N

1.8x 10⁴N

5.9 x 10⁴N

The area of no return at one intersection was calculated to be 59.0 m. What is the minimum length of time the traffic light should be yellow so a vehicle just entering the area of no return can clear the area while maintaining a speed of 70.0 km/h?

11.9 s

9.10 s

6.07 s

3.03 s

A high-performance car initially travelling 97.2 km/h came to a stop in just 2.9 s. The mass of the car and its contents was 1850 kg. What was the magnitude of the average net force (braking force) on the car while it decelerated?

1.7 x 10⁴N

4.9 x 10⁴N

1.8x 10⁴N

5.9 x 10⁴N

A baseball flew 19.6 m straight up into the air after being hit by a bat. How long should it take for the ball to return from its maximum height?

2.00 s

1.91 s

1.02 s

3.99 s

A driver took 1.5 s to scan the instrument panel. During this time, the car was travelling at a speed of 105 km/h. The distance the car travelled while the driver scanned the panel was

73 m

49 m

70 m

44 m

A traffic-safety engineer is designing a deceleration lane. She is basing the length of this lane on the distance needed to slow down from 126 km/h to 65 km/h in 8.0 s. How long will the deceleration lane be?

3.8 x 10² m

2.1 x 10² m

7.6 x 10² m

4.2 x 10² m

A driver took 1.5 s to scan the instrument panel. During this time, the car was travelling at a speed of 105 km/h. The distance the car travelled while the driver scanned the panel was

A piece of stone is attached to one end of spring is whirled round in a horizontal circle of radius 7m when the constant speed of the stone is 40ms-1 calculate the centripetal acceleration